./Ultimate.py --spec ../../sv-benchmarks/c/properties/unreach-call.prp --file ../../sv-benchmarks/c/array-crafted/xor5.i --full-output --architecture 32bit -------------------------------------------------------------------------------- Checking for ERROR reachability Using default analysis Version 38b53e6a Calling Ultimate with: /usr/lib/jvm/java-11-openjdk-amd64/bin/java -Dosgi.configuration.area=/tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_a460571b-f395-45fb-9a27-7e8e20061ee7/bin/uautomizer-ZsLfNo2U6R/data/config -Xmx15G -Xms4m -jar /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_a460571b-f395-45fb-9a27-7e8e20061ee7/bin/uautomizer-ZsLfNo2U6R/plugins/org.eclipse.equinox.launcher_1.5.800.v20200727-1323.jar -data @noDefault -ultimatedata /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_a460571b-f395-45fb-9a27-7e8e20061ee7/bin/uautomizer-ZsLfNo2U6R/data -tc /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_a460571b-f395-45fb-9a27-7e8e20061ee7/bin/uautomizer-ZsLfNo2U6R/config/AutomizerReach.xml -i ../../sv-benchmarks/c/array-crafted/xor5.i -s /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_a460571b-f395-45fb-9a27-7e8e20061ee7/bin/uautomizer-ZsLfNo2U6R/config/svcomp-Reach-32bit-Automizer_Default.epf --cacsl2boogietranslator.entry.function main --witnessprinter.witness.directory /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_a460571b-f395-45fb-9a27-7e8e20061ee7/bin/uautomizer-ZsLfNo2U6R --witnessprinter.witness.filename witness.graphml --witnessprinter.write.witness.besides.input.file false --witnessprinter.graph.data.specification CHECK( init(main()), LTL(G ! call(reach_error())) ) --witnessprinter.graph.data.producer Automizer --witnessprinter.graph.data.architecture 32bit --witnessprinter.graph.data.programhash a4ee2cdc1f0cbbd62309a70b71e98ce771ffa71f4ebd85e731799a93fbbc3919 --- Real Ultimate output --- [0.001s][warning][os,container] Duplicate cpuset controllers detected. Picking /sys/fs/cgroup/cpuset, skipping /sys/fs/cgroup/cpuset. This is Ultimate 0.2.2-dev-38b53e6 [2022-11-25 17:41:42,833 INFO L177 SettingsManager]: Resetting all preferences to default values... [2022-11-25 17:41:42,835 INFO L181 SettingsManager]: Resetting UltimateCore preferences to default values [2022-11-25 17:41:42,868 INFO L184 SettingsManager]: Ultimate Commandline Interface provides no preferences, ignoring... [2022-11-25 17:41:42,872 INFO L181 SettingsManager]: Resetting Boogie Preprocessor preferences to default values [2022-11-25 17:41:42,901 INFO L181 SettingsManager]: Resetting Boogie Procedure Inliner preferences to default values [2022-11-25 17:41:42,902 INFO L181 SettingsManager]: Resetting Abstract Interpretation preferences to default values [2022-11-25 17:41:42,906 INFO L181 SettingsManager]: Resetting LassoRanker preferences to default values [2022-11-25 17:41:42,909 INFO L181 SettingsManager]: Resetting Reaching Definitions preferences to default values [2022-11-25 17:41:42,912 INFO L181 SettingsManager]: Resetting SyntaxChecker preferences to default values [2022-11-25 17:41:42,912 INFO L181 SettingsManager]: Resetting Sifa preferences to default values [2022-11-25 17:41:42,913 INFO L184 SettingsManager]: Büchi Program Product provides no preferences, ignoring... [2022-11-25 17:41:42,914 INFO L181 SettingsManager]: Resetting LTL2Aut preferences to default values [2022-11-25 17:41:42,915 INFO L181 SettingsManager]: Resetting PEA to Boogie preferences to default values [2022-11-25 17:41:42,916 INFO L181 SettingsManager]: Resetting BlockEncodingV2 preferences to default values [2022-11-25 17:41:42,917 INFO L181 SettingsManager]: Resetting ChcToBoogie preferences to default values [2022-11-25 17:41:42,918 INFO L181 SettingsManager]: Resetting AutomataScriptInterpreter preferences to default values [2022-11-25 17:41:42,918 INFO L181 SettingsManager]: Resetting BuchiAutomizer preferences to default values [2022-11-25 17:41:42,920 INFO L181 SettingsManager]: Resetting CACSL2BoogieTranslator preferences to default values [2022-11-25 17:41:42,922 INFO L181 SettingsManager]: Resetting CodeCheck preferences to default values [2022-11-25 17:41:42,931 INFO L181 SettingsManager]: Resetting InvariantSynthesis preferences to default values [2022-11-25 17:41:42,940 INFO L181 SettingsManager]: Resetting RCFGBuilder preferences to default values [2022-11-25 17:41:42,942 INFO L181 SettingsManager]: Resetting Referee preferences to default values [2022-11-25 17:41:42,943 INFO L181 SettingsManager]: Resetting TraceAbstraction preferences to default values [2022-11-25 17:41:42,946 INFO L184 SettingsManager]: TraceAbstractionConcurrent provides no preferences, ignoring... [2022-11-25 17:41:42,947 INFO L184 SettingsManager]: TraceAbstractionWithAFAs provides no preferences, ignoring... [2022-11-25 17:41:42,947 INFO L181 SettingsManager]: Resetting TreeAutomizer preferences to default values [2022-11-25 17:41:42,948 INFO L181 SettingsManager]: Resetting IcfgToChc preferences to default values [2022-11-25 17:41:42,948 INFO L181 SettingsManager]: Resetting IcfgTransformer preferences to default values [2022-11-25 17:41:42,949 INFO L184 SettingsManager]: ReqToTest provides no preferences, ignoring... [2022-11-25 17:41:42,950 INFO L181 SettingsManager]: Resetting Boogie Printer preferences to default values [2022-11-25 17:41:42,950 INFO L181 SettingsManager]: Resetting ChcSmtPrinter preferences to default values [2022-11-25 17:41:42,951 INFO L181 SettingsManager]: Resetting ReqPrinter preferences to default values [2022-11-25 17:41:42,952 INFO L181 SettingsManager]: Resetting Witness Printer preferences to default values [2022-11-25 17:41:42,953 INFO L184 SettingsManager]: Boogie PL CUP Parser provides no preferences, ignoring... [2022-11-25 17:41:42,953 INFO L181 SettingsManager]: Resetting CDTParser preferences to default values [2022-11-25 17:41:42,954 INFO L184 SettingsManager]: AutomataScriptParser provides no preferences, ignoring... [2022-11-25 17:41:42,954 INFO L184 SettingsManager]: ReqParser provides no preferences, ignoring... [2022-11-25 17:41:42,954 INFO L181 SettingsManager]: Resetting SmtParser preferences to default values [2022-11-25 17:41:42,955 INFO L181 SettingsManager]: Resetting Witness Parser preferences to default values [2022-11-25 17:41:42,956 INFO L188 SettingsManager]: Finished resetting all preferences to default values... [2022-11-25 17:41:42,957 INFO L101 SettingsManager]: Beginning loading settings from /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_a460571b-f395-45fb-9a27-7e8e20061ee7/bin/uautomizer-ZsLfNo2U6R/config/svcomp-Reach-32bit-Automizer_Default.epf [2022-11-25 17:41:42,980 INFO L113 SettingsManager]: Loading preferences was successful [2022-11-25 17:41:42,981 INFO L115 SettingsManager]: Preferences different from defaults after loading the file: [2022-11-25 17:41:42,981 INFO L136 SettingsManager]: Preferences of UltimateCore differ from their defaults: [2022-11-25 17:41:42,981 INFO L138 SettingsManager]: * Log level for class=de.uni_freiburg.informatik.ultimate.lib.smtlibutils.quantifier.QuantifierPusher=ERROR; [2022-11-25 17:41:42,982 INFO L136 SettingsManager]: Preferences of Boogie Procedure Inliner differ from their defaults: [2022-11-25 17:41:42,982 INFO L138 SettingsManager]: * Ignore calls to procedures called more than once=ONLY_FOR_SEQUENTIAL_PROGRAMS [2022-11-25 17:41:42,983 INFO L136 SettingsManager]: Preferences of BlockEncodingV2 differ from their defaults: [2022-11-25 17:41:42,983 INFO L138 SettingsManager]: * Create parallel compositions if possible=false [2022-11-25 17:41:42,983 INFO L138 SettingsManager]: * Use SBE=true [2022-11-25 17:41:42,983 INFO L136 SettingsManager]: Preferences of CACSL2BoogieTranslator differ from their defaults: [2022-11-25 17:41:42,983 INFO L138 SettingsManager]: * sizeof long=4 [2022-11-25 17:41:42,984 INFO L138 SettingsManager]: * Overapproximate operations on floating types=true [2022-11-25 17:41:42,984 INFO L138 SettingsManager]: * sizeof POINTER=4 [2022-11-25 17:41:42,984 INFO L138 SettingsManager]: * Check division by zero=IGNORE [2022-11-25 17:41:42,984 INFO L138 SettingsManager]: * Pointer to allocated memory at dereference=IGNORE [2022-11-25 17:41:42,984 INFO L138 SettingsManager]: * If two pointers are subtracted or compared they have the same base address=IGNORE [2022-11-25 17:41:42,985 INFO L138 SettingsManager]: * Check array bounds for arrays that are off heap=IGNORE [2022-11-25 17:41:42,985 INFO L138 SettingsManager]: * sizeof long double=12 [2022-11-25 17:41:42,985 INFO L138 SettingsManager]: * Check if freed pointer was valid=false [2022-11-25 17:41:42,985 INFO L138 SettingsManager]: * Use constant arrays=true [2022-11-25 17:41:42,985 INFO L138 SettingsManager]: * Pointer base address is valid at dereference=IGNORE [2022-11-25 17:41:42,985 INFO L136 SettingsManager]: Preferences of RCFGBuilder differ from their defaults: [2022-11-25 17:41:42,986 INFO L138 SettingsManager]: * Size of a code block=SequenceOfStatements [2022-11-25 17:41:42,986 INFO L138 SettingsManager]: * SMT solver=External_DefaultMode [2022-11-25 17:41:42,986 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2022-11-25 17:41:42,986 INFO L136 SettingsManager]: Preferences of TraceAbstraction differ from their defaults: [2022-11-25 17:41:42,986 INFO L138 SettingsManager]: * Compute Interpolants along a Counterexample=FPandBP [2022-11-25 17:41:42,987 INFO L138 SettingsManager]: * Positions where we compute the Hoare Annotation=LoopsAndPotentialCycles [2022-11-25 17:41:42,987 INFO L138 SettingsManager]: * Trace refinement strategy=CAMEL [2022-11-25 17:41:42,987 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in [2022-11-25 17:41:42,987 INFO L138 SettingsManager]: * Automaton type used in concurrency analysis=PETRI_NET [2022-11-25 17:41:42,987 INFO L138 SettingsManager]: * Compute Hoare Annotation of negated interpolant automaton, abstraction and CFG=true [2022-11-25 17:41:42,987 INFO L138 SettingsManager]: * Order on configurations for Petri net unfoldings=DBO [2022-11-25 17:41:42,988 INFO L138 SettingsManager]: * SMT solver=External_ModelsAndUnsatCoreMode [2022-11-25 17:41:42,988 INFO L138 SettingsManager]: * Looper check in Petri net analysis=SEMANTIC WARNING: An illegal reflective access operation has occurred WARNING: Illegal reflective access by com.sun.xml.bind.v2.runtime.reflect.opt.Injector$1 (file:/tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_a460571b-f395-45fb-9a27-7e8e20061ee7/bin/uautomizer-ZsLfNo2U6R/plugins/com.sun.xml.bind_2.2.0.v201505121915.jar) to method java.lang.ClassLoader.defineClass(java.lang.String,byte[],int,int) WARNING: Please consider reporting this to the maintainers of com.sun.xml.bind.v2.runtime.reflect.opt.Injector$1 WARNING: Use --illegal-access=warn to enable warnings of further illegal reflective access operations WARNING: All illegal access operations will be denied in a future release Applying setting for plugin de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator: Entry function -> main Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Witness directory -> /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_a460571b-f395-45fb-9a27-7e8e20061ee7/bin/uautomizer-ZsLfNo2U6R Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Witness filename -> witness.graphml Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Write witness besides input file -> false Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data specification -> CHECK( init(main()), LTL(G ! call(reach_error())) ) Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data producer -> Automizer Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data architecture -> 32bit Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data programhash -> a4ee2cdc1f0cbbd62309a70b71e98ce771ffa71f4ebd85e731799a93fbbc3919 [2022-11-25 17:41:43,290 INFO L75 nceAwareModelManager]: Repository-Root is: /tmp [2022-11-25 17:41:43,319 INFO L261 ainManager$Toolchain]: [Toolchain 1]: Applicable parser(s) successfully (re)initialized [2022-11-25 17:41:43,322 INFO L217 ainManager$Toolchain]: [Toolchain 1]: Toolchain selected. [2022-11-25 17:41:43,323 INFO L271 PluginConnector]: Initializing CDTParser... [2022-11-25 17:41:43,324 INFO L275 PluginConnector]: CDTParser initialized [2022-11-25 17:41:43,325 INFO L432 ainManager$Toolchain]: [Toolchain 1]: Parsing single file: /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_a460571b-f395-45fb-9a27-7e8e20061ee7/bin/uautomizer-ZsLfNo2U6R/../../sv-benchmarks/c/array-crafted/xor5.i [2022-11-25 17:41:46,408 INFO L500 CDTParser]: Created temporary CDT project at NULL [2022-11-25 17:41:46,754 INFO L351 CDTParser]: Found 1 translation units. [2022-11-25 17:41:46,754 INFO L172 CDTParser]: Scanning /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_a460571b-f395-45fb-9a27-7e8e20061ee7/sv-benchmarks/c/array-crafted/xor5.i [2022-11-25 17:41:46,762 INFO L394 CDTParser]: About to delete temporary CDT project at /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_a460571b-f395-45fb-9a27-7e8e20061ee7/bin/uautomizer-ZsLfNo2U6R/data/6786a59a1/72ea0fbf09f244b29c4e30afe3f6c450/FLAG72c2d419e [2022-11-25 17:41:46,789 INFO L402 CDTParser]: Successfully deleted /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_a460571b-f395-45fb-9a27-7e8e20061ee7/bin/uautomizer-ZsLfNo2U6R/data/6786a59a1/72ea0fbf09f244b29c4e30afe3f6c450 [2022-11-25 17:41:46,796 INFO L299 ainManager$Toolchain]: ####################### [Toolchain 1] ####################### [2022-11-25 17:41:46,798 INFO L131 ToolchainWalker]: Walking toolchain with 6 elements. [2022-11-25 17:41:46,802 INFO L113 PluginConnector]: ------------------------CACSL2BoogieTranslator---------------------------- [2022-11-25 17:41:46,802 INFO L271 PluginConnector]: Initializing CACSL2BoogieTranslator... [2022-11-25 17:41:46,807 INFO L275 PluginConnector]: CACSL2BoogieTranslator initialized [2022-11-25 17:41:46,808 INFO L185 PluginConnector]: Executing the observer ACSLObjectContainerObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 25.11 05:41:46" (1/1) ... [2022-11-25 17:41:46,809 INFO L205 PluginConnector]: Invalid model from CACSL2BoogieTranslator for observer de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator.ACSLObjectContainerObserver@1a2064fa and model type de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 25.11 05:41:46, skipping insertion in model container [2022-11-25 17:41:46,809 INFO L185 PluginConnector]: Executing the observer CACSL2BoogieTranslatorObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 25.11 05:41:46" (1/1) ... [2022-11-25 17:41:46,817 INFO L145 MainTranslator]: Starting translation in SV-COMP mode [2022-11-25 17:41:46,838 INFO L178 MainTranslator]: Built tables and reachable declarations [2022-11-25 17:41:47,067 WARN L237 ndardFunctionHandler]: Function reach_error is already implemented but we override the implementation for the call at /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_a460571b-f395-45fb-9a27-7e8e20061ee7/sv-benchmarks/c/array-crafted/xor5.i[1364,1377] [2022-11-25 17:41:47,071 INFO L210 PostProcessor]: Analyzing one entry point: main [2022-11-25 17:41:47,084 INFO L203 MainTranslator]: Completed pre-run [2022-11-25 17:41:47,127 WARN L237 ndardFunctionHandler]: Function reach_error is already implemented but we override the implementation for the call at /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_a460571b-f395-45fb-9a27-7e8e20061ee7/sv-benchmarks/c/array-crafted/xor5.i[1364,1377] [2022-11-25 17:41:47,128 INFO L210 PostProcessor]: Analyzing one entry point: main [2022-11-25 17:41:47,145 INFO L208 MainTranslator]: Completed translation [2022-11-25 17:41:47,146 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 25.11 05:41:47 WrapperNode [2022-11-25 17:41:47,146 INFO L132 PluginConnector]: ------------------------ END CACSL2BoogieTranslator---------------------------- [2022-11-25 17:41:47,147 INFO L113 PluginConnector]: ------------------------Boogie Procedure Inliner---------------------------- [2022-11-25 17:41:47,147 INFO L271 PluginConnector]: Initializing Boogie Procedure Inliner... [2022-11-25 17:41:47,147 INFO L275 PluginConnector]: Boogie Procedure Inliner initialized [2022-11-25 17:41:47,155 INFO L185 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Procedure Inliner for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 25.11 05:41:47" (1/1) ... [2022-11-25 17:41:47,177 INFO L185 PluginConnector]: Executing the observer Inliner from plugin Boogie Procedure Inliner for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 25.11 05:41:47" (1/1) ... [2022-11-25 17:41:47,209 INFO L138 Inliner]: procedures = 16, calls = 29, calls flagged for inlining = 2, calls inlined = 2, statements flattened = 77 [2022-11-25 17:41:47,209 INFO L132 PluginConnector]: ------------------------ END Boogie Procedure Inliner---------------------------- [2022-11-25 17:41:47,210 INFO L113 PluginConnector]: ------------------------Boogie Preprocessor---------------------------- [2022-11-25 17:41:47,210 INFO L271 PluginConnector]: Initializing Boogie Preprocessor... [2022-11-25 17:41:47,211 INFO L275 PluginConnector]: Boogie Preprocessor initialized [2022-11-25 17:41:47,221 INFO L185 PluginConnector]: Executing the observer EnsureBoogieModelObserver from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 25.11 05:41:47" (1/1) ... [2022-11-25 17:41:47,221 INFO L185 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 25.11 05:41:47" (1/1) ... [2022-11-25 17:41:47,229 INFO L185 PluginConnector]: Executing the observer ConstExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 25.11 05:41:47" (1/1) ... [2022-11-25 17:41:47,230 INFO L185 PluginConnector]: Executing the observer StructExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 25.11 05:41:47" (1/1) ... [2022-11-25 17:41:47,247 INFO L185 PluginConnector]: Executing the observer UnstructureCode from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 25.11 05:41:47" (1/1) ... [2022-11-25 17:41:47,251 INFO L185 PluginConnector]: Executing the observer FunctionInliner from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 25.11 05:41:47" (1/1) ... [2022-11-25 17:41:47,252 INFO L185 PluginConnector]: Executing the observer LTLStepAnnotator from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 25.11 05:41:47" (1/1) ... [2022-11-25 17:41:47,254 INFO L185 PluginConnector]: Executing the observer BoogieSymbolTableConstructor from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 25.11 05:41:47" (1/1) ... [2022-11-25 17:41:47,267 INFO L132 PluginConnector]: ------------------------ END Boogie Preprocessor---------------------------- [2022-11-25 17:41:47,268 INFO L113 PluginConnector]: ------------------------RCFGBuilder---------------------------- [2022-11-25 17:41:47,268 INFO L271 PluginConnector]: Initializing RCFGBuilder... [2022-11-25 17:41:47,269 INFO L275 PluginConnector]: RCFGBuilder initialized [2022-11-25 17:41:47,270 INFO L185 PluginConnector]: Executing the observer RCFGBuilderObserver from plugin RCFGBuilder for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 25.11 05:41:47" (1/1) ... [2022-11-25 17:41:47,279 INFO L173 SolverBuilder]: Constructing external solver with command: z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2022-11-25 17:41:47,293 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_a460571b-f395-45fb-9a27-7e8e20061ee7/bin/uautomizer-ZsLfNo2U6R/z3 [2022-11-25 17:41:47,312 INFO L229 MonitoredProcess]: Starting monitored process 1 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_a460571b-f395-45fb-9a27-7e8e20061ee7/bin/uautomizer-ZsLfNo2U6R/z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 (exit command is (exit), workingDir is null) [2022-11-25 17:41:47,345 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_a460571b-f395-45fb-9a27-7e8e20061ee7/bin/uautomizer-ZsLfNo2U6R/z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 (1)] Waiting until timeout for monitored process [2022-11-25 17:41:47,366 INFO L130 BoogieDeclarations]: Found specification of procedure #Ultimate.allocInit [2022-11-25 17:41:47,367 INFO L130 BoogieDeclarations]: Found specification of procedure write~init~int [2022-11-25 17:41:47,367 INFO L130 BoogieDeclarations]: Found specification of procedure #Ultimate.allocOnStack [2022-11-25 17:41:47,367 INFO L130 BoogieDeclarations]: Found specification of procedure write~int [2022-11-25 17:41:47,367 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.start [2022-11-25 17:41:47,369 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.start [2022-11-25 17:41:47,370 INFO L130 BoogieDeclarations]: Found specification of procedure read~int [2022-11-25 17:41:47,370 INFO L130 BoogieDeclarations]: Found specification of procedure xor [2022-11-25 17:41:47,370 INFO L138 BoogieDeclarations]: Found implementation of procedure xor [2022-11-25 17:41:47,370 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.dealloc [2022-11-25 17:41:47,482 INFO L235 CfgBuilder]: Building ICFG [2022-11-25 17:41:47,484 INFO L261 CfgBuilder]: Building CFG for each procedure with an implementation [2022-11-25 17:41:47,736 INFO L276 CfgBuilder]: Performing block encoding [2022-11-25 17:41:47,743 INFO L295 CfgBuilder]: Using the 1 location(s) as analysis (start of procedure ULTIMATE.start) [2022-11-25 17:41:47,743 INFO L300 CfgBuilder]: Removed 3 assume(true) statements. [2022-11-25 17:41:47,745 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 25.11 05:41:47 BoogieIcfgContainer [2022-11-25 17:41:47,745 INFO L132 PluginConnector]: ------------------------ END RCFGBuilder---------------------------- [2022-11-25 17:41:47,748 INFO L113 PluginConnector]: ------------------------TraceAbstraction---------------------------- [2022-11-25 17:41:47,748 INFO L271 PluginConnector]: Initializing TraceAbstraction... [2022-11-25 17:41:47,752 INFO L275 PluginConnector]: TraceAbstraction initialized [2022-11-25 17:41:47,752 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "CDTParser AST 25.11 05:41:46" (1/3) ... [2022-11-25 17:41:47,753 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@5c7efbb2 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 25.11 05:41:47, skipping insertion in model container [2022-11-25 17:41:47,753 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 25.11 05:41:47" (2/3) ... [2022-11-25 17:41:47,753 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@5c7efbb2 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 25.11 05:41:47, skipping insertion in model container [2022-11-25 17:41:47,754 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 25.11 05:41:47" (3/3) ... [2022-11-25 17:41:47,755 INFO L112 eAbstractionObserver]: Analyzing ICFG xor5.i [2022-11-25 17:41:47,776 INFO L203 ceAbstractionStarter]: Automizer settings: Hoare:true NWA Interpolation:FPandBP Determinization: PREDICATE_ABSTRACTION [2022-11-25 17:41:47,776 INFO L162 ceAbstractionStarter]: Applying trace abstraction to program that has 1 error locations. [2022-11-25 17:41:47,829 INFO L356 AbstractCegarLoop]: ======== Iteration 0 == of CEGAR loop == AllErrorsAtOnce ======== [2022-11-25 17:41:47,836 INFO L357 AbstractCegarLoop]: Settings: SEPARATE_VIOLATION_CHECK=true, mInterprocedural=true, mMaxIterations=1000000, mWatchIteration=1000000, mArtifact=RCFG, mInterpolation=FPandBP, mInterpolantAutomaton=STRAIGHT_LINE, mDumpAutomata=false, mAutomataFormat=ATS_NUMERATE, mDumpPath=., mDeterminiation=PREDICATE_ABSTRACTION, mMinimize=MINIMIZE_SEVPA, mHoare=true, mAutomataTypeConcurrency=PETRI_NET, mHoareTripleChecks=INCREMENTAL, mHoareAnnotationPositions=LoopsAndPotentialCycles, mDumpOnlyReuseAutomata=false, mLimitTraceHistogram=0, mErrorLocTimeLimit=0, mLimitPathProgramCount=0, mCollectInterpolantStatistics=true, mHeuristicEmptinessCheck=false, mHeuristicEmptinessCheckAStarHeuristic=ZERO, mHeuristicEmptinessCheckAStarHeuristicRandomSeed=1337, mHeuristicEmptinessCheckSmtFeatureScoringMethod=DAGSIZE, mSMTFeatureExtraction=false, mSMTFeatureExtractionDumpPath=., mOverrideInterpolantAutomaton=false, mMcrInterpolantMethod=WP, mPorIndependenceSettings=[Lde.uni_freiburg.informatik.ultimate.lib.tracecheckerutils.partialorder.independence.IndependenceSettings;@2bb90e4c, mLbeIndependenceSettings=[IndependenceType=SEMANTIC, AbstractionType=NONE, UseConditional=false, UseSemiCommutativity=true, Solver=Z3, SolverTimeout=1000ms] [2022-11-25 17:41:47,837 INFO L358 AbstractCegarLoop]: Starting to check reachability of 1 error locations. [2022-11-25 17:41:47,841 INFO L276 IsEmpty]: Start isEmpty. Operand has 32 states, 26 states have (on average 1.4615384615384615) internal successors, (38), 27 states have internal predecessors, (38), 3 states have call successors, (3), 1 states have call predecessors, (3), 1 states have return successors, (3), 3 states have call predecessors, (3), 3 states have call successors, (3) [2022-11-25 17:41:47,851 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 30 [2022-11-25 17:41:47,851 INFO L187 NwaCegarLoop]: Found error trace [2022-11-25 17:41:47,852 INFO L195 NwaCegarLoop]: trace histogram [3, 3, 3, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-11-25 17:41:47,853 INFO L420 AbstractCegarLoop]: === Iteration 1 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-11-25 17:41:47,858 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-11-25 17:41:47,858 INFO L85 PathProgramCache]: Analyzing trace with hash -1534900111, now seen corresponding path program 1 times [2022-11-25 17:41:47,878 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-11-25 17:41:47,879 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [91043271] [2022-11-25 17:41:47,879 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-25 17:41:47,881 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-11-25 17:41:48,020 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-25 17:41:48,134 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 4 [2022-11-25 17:41:48,139 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-25 17:41:48,147 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 11 [2022-11-25 17:41:48,151 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-25 17:41:48,157 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 20 [2022-11-25 17:41:48,161 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-25 17:41:48,167 INFO L134 CoverageAnalysis]: Checked inductivity of 15 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 15 trivial. 0 not checked. [2022-11-25 17:41:48,168 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-11-25 17:41:48,168 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [91043271] [2022-11-25 17:41:48,169 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [91043271] provided 1 perfect and 0 imperfect interpolant sequences [2022-11-25 17:41:48,169 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-11-25 17:41:48,170 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [2] imperfect sequences [] total 2 [2022-11-25 17:41:48,171 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [208042819] [2022-11-25 17:41:48,172 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-11-25 17:41:48,177 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 2 states [2022-11-25 17:41:48,177 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-11-25 17:41:48,215 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 2 interpolants. [2022-11-25 17:41:48,217 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=1, Invalid=1, Unknown=0, NotChecked=0, Total=2 [2022-11-25 17:41:48,220 INFO L87 Difference]: Start difference. First operand has 32 states, 26 states have (on average 1.4615384615384615) internal successors, (38), 27 states have internal predecessors, (38), 3 states have call successors, (3), 1 states have call predecessors, (3), 1 states have return successors, (3), 3 states have call predecessors, (3), 3 states have call successors, (3) Second operand has 2 states, 2 states have (on average 7.5) internal successors, (15), 2 states have internal predecessors, (15), 1 states have call successors, (3), 1 states have call predecessors, (3), 1 states have return successors, (3), 1 states have call predecessors, (3), 1 states have call successors, (3) [2022-11-25 17:41:48,257 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-11-25 17:41:48,257 INFO L93 Difference]: Finished difference Result 59 states and 83 transitions. [2022-11-25 17:41:48,259 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 2 states. [2022-11-25 17:41:48,261 INFO L78 Accepts]: Start accepts. Automaton has has 2 states, 2 states have (on average 7.5) internal successors, (15), 2 states have internal predecessors, (15), 1 states have call successors, (3), 1 states have call predecessors, (3), 1 states have return successors, (3), 1 states have call predecessors, (3), 1 states have call successors, (3) Word has length 29 [2022-11-25 17:41:48,262 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-11-25 17:41:48,267 INFO L225 Difference]: With dead ends: 59 [2022-11-25 17:41:48,268 INFO L226 Difference]: Without dead ends: 27 [2022-11-25 17:41:48,271 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 11 GetRequests, 11 SyntacticMatches, 0 SemanticMatches, 0 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=1, Invalid=1, Unknown=0, NotChecked=0, Total=2 [2022-11-25 17:41:48,275 INFO L413 NwaCegarLoop]: 40 mSDtfsCounter, 0 mSDsluCounter, 0 mSDsCounter, 0 mSdLazyCounter, 0 mSolverCounterSat, 0 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 0 SdHoareTripleChecker+Valid, 40 SdHoareTripleChecker+Invalid, 0 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 0 IncrementalHoareTripleChecker+Valid, 0 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.0s IncrementalHoareTripleChecker+Time [2022-11-25 17:41:48,276 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [0 Valid, 40 Invalid, 0 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [0 Valid, 0 Invalid, 0 Unknown, 0 Unchecked, 0.0s Time] [2022-11-25 17:41:48,292 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 27 states. [2022-11-25 17:41:48,313 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 27 to 27. [2022-11-25 17:41:48,314 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 27 states, 22 states have (on average 1.2727272727272727) internal successors, (28), 22 states have internal predecessors, (28), 3 states have call successors, (3), 1 states have call predecessors, (3), 1 states have return successors, (3), 3 states have call predecessors, (3), 3 states have call successors, (3) [2022-11-25 17:41:48,318 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 27 states to 27 states and 34 transitions. [2022-11-25 17:41:48,319 INFO L78 Accepts]: Start accepts. Automaton has 27 states and 34 transitions. Word has length 29 [2022-11-25 17:41:48,320 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-11-25 17:41:48,321 INFO L495 AbstractCegarLoop]: Abstraction has 27 states and 34 transitions. [2022-11-25 17:41:48,322 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 2 states, 2 states have (on average 7.5) internal successors, (15), 2 states have internal predecessors, (15), 1 states have call successors, (3), 1 states have call predecessors, (3), 1 states have return successors, (3), 1 states have call predecessors, (3), 1 states have call successors, (3) [2022-11-25 17:41:48,322 INFO L276 IsEmpty]: Start isEmpty. Operand 27 states and 34 transitions. [2022-11-25 17:41:48,325 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 30 [2022-11-25 17:41:48,325 INFO L187 NwaCegarLoop]: Found error trace [2022-11-25 17:41:48,326 INFO L195 NwaCegarLoop]: trace histogram [3, 3, 3, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-11-25 17:41:48,327 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable0 [2022-11-25 17:41:48,327 INFO L420 AbstractCegarLoop]: === Iteration 2 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-11-25 17:41:48,332 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-11-25 17:41:48,332 INFO L85 PathProgramCache]: Analyzing trace with hash 1825578618, now seen corresponding path program 1 times [2022-11-25 17:41:48,333 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-11-25 17:41:48,334 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2009515960] [2022-11-25 17:41:48,334 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-25 17:41:48,335 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-11-25 17:41:48,390 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-25 17:41:48,589 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 4 [2022-11-25 17:41:48,595 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-25 17:41:48,601 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 11 [2022-11-25 17:41:48,608 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-25 17:41:48,637 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 20 [2022-11-25 17:41:48,643 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-25 17:41:48,650 INFO L134 CoverageAnalysis]: Checked inductivity of 15 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 15 trivial. 0 not checked. [2022-11-25 17:41:48,650 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-11-25 17:41:48,650 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [2009515960] [2022-11-25 17:41:48,651 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [2009515960] provided 1 perfect and 0 imperfect interpolant sequences [2022-11-25 17:41:48,651 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-11-25 17:41:48,651 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2022-11-25 17:41:48,651 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1042599153] [2022-11-25 17:41:48,651 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-11-25 17:41:48,653 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2022-11-25 17:41:48,653 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-11-25 17:41:48,654 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2022-11-25 17:41:48,654 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2022-11-25 17:41:48,654 INFO L87 Difference]: Start difference. First operand 27 states and 34 transitions. Second operand has 3 states, 3 states have (on average 5.0) internal successors, (15), 3 states have internal predecessors, (15), 1 states have call successors, (3), 1 states have call predecessors, (3), 1 states have return successors, (3), 1 states have call predecessors, (3), 1 states have call successors, (3) [2022-11-25 17:41:48,688 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-11-25 17:41:48,688 INFO L93 Difference]: Finished difference Result 51 states and 65 transitions. [2022-11-25 17:41:48,689 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2022-11-25 17:41:48,689 INFO L78 Accepts]: Start accepts. Automaton has has 3 states, 3 states have (on average 5.0) internal successors, (15), 3 states have internal predecessors, (15), 1 states have call successors, (3), 1 states have call predecessors, (3), 1 states have return successors, (3), 1 states have call predecessors, (3), 1 states have call successors, (3) Word has length 29 [2022-11-25 17:41:48,689 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-11-25 17:41:48,690 INFO L225 Difference]: With dead ends: 51 [2022-11-25 17:41:48,690 INFO L226 Difference]: Without dead ends: 29 [2022-11-25 17:41:48,691 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 9 GetRequests, 8 SyntacticMatches, 0 SemanticMatches, 1 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2022-11-25 17:41:48,692 INFO L413 NwaCegarLoop]: 32 mSDtfsCounter, 1 mSDsluCounter, 23 mSDsCounter, 0 mSdLazyCounter, 12 mSolverCounterSat, 0 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 1 SdHoareTripleChecker+Valid, 55 SdHoareTripleChecker+Invalid, 12 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 0 IncrementalHoareTripleChecker+Valid, 12 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.0s IncrementalHoareTripleChecker+Time [2022-11-25 17:41:48,693 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [1 Valid, 55 Invalid, 12 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [0 Valid, 12 Invalid, 0 Unknown, 0 Unchecked, 0.0s Time] [2022-11-25 17:41:48,694 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 29 states. [2022-11-25 17:41:48,698 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 29 to 28. [2022-11-25 17:41:48,698 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 28 states, 23 states have (on average 1.2608695652173914) internal successors, (29), 23 states have internal predecessors, (29), 3 states have call successors, (3), 1 states have call predecessors, (3), 1 states have return successors, (3), 3 states have call predecessors, (3), 3 states have call successors, (3) [2022-11-25 17:41:48,699 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 28 states to 28 states and 35 transitions. [2022-11-25 17:41:48,700 INFO L78 Accepts]: Start accepts. Automaton has 28 states and 35 transitions. Word has length 29 [2022-11-25 17:41:48,700 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-11-25 17:41:48,700 INFO L495 AbstractCegarLoop]: Abstraction has 28 states and 35 transitions. [2022-11-25 17:41:48,700 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 3 states have (on average 5.0) internal successors, (15), 3 states have internal predecessors, (15), 1 states have call successors, (3), 1 states have call predecessors, (3), 1 states have return successors, (3), 1 states have call predecessors, (3), 1 states have call successors, (3) [2022-11-25 17:41:48,701 INFO L276 IsEmpty]: Start isEmpty. Operand 28 states and 35 transitions. [2022-11-25 17:41:48,702 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 32 [2022-11-25 17:41:48,702 INFO L187 NwaCegarLoop]: Found error trace [2022-11-25 17:41:48,702 INFO L195 NwaCegarLoop]: trace histogram [3, 3, 3, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-11-25 17:41:48,702 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable1 [2022-11-25 17:41:48,703 INFO L420 AbstractCegarLoop]: === Iteration 3 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-11-25 17:41:48,703 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-11-25 17:41:48,703 INFO L85 PathProgramCache]: Analyzing trace with hash 1516402972, now seen corresponding path program 1 times [2022-11-25 17:41:48,704 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-11-25 17:41:48,704 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1696024928] [2022-11-25 17:41:48,704 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-25 17:41:48,705 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-11-25 17:41:48,728 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-25 17:41:48,810 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 6 [2022-11-25 17:41:48,814 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-25 17:41:48,845 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 13 [2022-11-25 17:41:48,849 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-25 17:41:48,855 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 22 [2022-11-25 17:41:48,859 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-25 17:41:48,865 INFO L134 CoverageAnalysis]: Checked inductivity of 16 backedges. 0 proven. 8 refuted. 0 times theorem prover too weak. 8 trivial. 0 not checked. [2022-11-25 17:41:48,865 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-11-25 17:41:48,865 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1696024928] [2022-11-25 17:41:48,865 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1696024928] provided 0 perfect and 1 imperfect interpolant sequences [2022-11-25 17:41:48,866 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1509011356] [2022-11-25 17:41:48,866 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-25 17:41:48,866 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-11-25 17:41:48,867 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_a460571b-f395-45fb-9a27-7e8e20061ee7/bin/uautomizer-ZsLfNo2U6R/z3 [2022-11-25 17:41:48,870 INFO L229 MonitoredProcess]: Starting monitored process 2 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_a460571b-f395-45fb-9a27-7e8e20061ee7/bin/uautomizer-ZsLfNo2U6R/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-11-25 17:41:48,914 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_a460571b-f395-45fb-9a27-7e8e20061ee7/bin/uautomizer-ZsLfNo2U6R/z3 -smt2 -in SMTLIB2_COMPLIANT=true (2)] Waiting until timeout for monitored process [2022-11-25 17:41:49,017 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-25 17:41:49,020 INFO L263 TraceCheckSpWp]: Trace formula consists of 155 conjuncts, 4 conjunts are in the unsatisfiable core [2022-11-25 17:41:49,028 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-11-25 17:41:49,134 INFO L134 CoverageAnalysis]: Checked inductivity of 16 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 15 trivial. 0 not checked. [2022-11-25 17:41:49,134 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-11-25 17:41:49,190 INFO L134 CoverageAnalysis]: Checked inductivity of 16 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 15 trivial. 0 not checked. [2022-11-25 17:41:49,191 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1509011356] provided 0 perfect and 2 imperfect interpolant sequences [2022-11-25 17:41:49,191 INFO L184 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-11-25 17:41:49,191 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [5, 4, 4] total 9 [2022-11-25 17:41:49,192 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2022816333] [2022-11-25 17:41:49,192 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-11-25 17:41:49,192 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 9 states [2022-11-25 17:41:49,193 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-11-25 17:41:49,194 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 9 interpolants. [2022-11-25 17:41:49,194 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=22, Invalid=50, Unknown=0, NotChecked=0, Total=72 [2022-11-25 17:41:49,194 INFO L87 Difference]: Start difference. First operand 28 states and 35 transitions. Second operand has 9 states, 9 states have (on average 3.6666666666666665) internal successors, (33), 9 states have internal predecessors, (33), 2 states have call successors, (7), 2 states have call predecessors, (7), 3 states have return successors, (7), 1 states have call predecessors, (7), 2 states have call successors, (7) [2022-11-25 17:41:49,350 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-11-25 17:41:49,353 INFO L93 Difference]: Finished difference Result 59 states and 80 transitions. [2022-11-25 17:41:49,353 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 8 states. [2022-11-25 17:41:49,354 INFO L78 Accepts]: Start accepts. Automaton has has 9 states, 9 states have (on average 3.6666666666666665) internal successors, (33), 9 states have internal predecessors, (33), 2 states have call successors, (7), 2 states have call predecessors, (7), 3 states have return successors, (7), 1 states have call predecessors, (7), 2 states have call successors, (7) Word has length 31 [2022-11-25 17:41:49,354 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-11-25 17:41:49,355 INFO L225 Difference]: With dead ends: 59 [2022-11-25 17:41:49,358 INFO L226 Difference]: Without dead ends: 37 [2022-11-25 17:41:49,359 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 73 GetRequests, 64 SyntacticMatches, 0 SemanticMatches, 9 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 7 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=32, Invalid=78, Unknown=0, NotChecked=0, Total=110 [2022-11-25 17:41:49,360 INFO L413 NwaCegarLoop]: 25 mSDtfsCounter, 46 mSDsluCounter, 88 mSDsCounter, 0 mSdLazyCounter, 85 mSolverCounterSat, 3 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 46 SdHoareTripleChecker+Valid, 113 SdHoareTripleChecker+Invalid, 88 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 3 IncrementalHoareTripleChecker+Valid, 85 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2022-11-25 17:41:49,363 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [46 Valid, 113 Invalid, 88 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [3 Valid, 85 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2022-11-25 17:41:49,364 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 37 states. [2022-11-25 17:41:49,370 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 37 to 31. [2022-11-25 17:41:49,371 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 31 states, 26 states have (on average 1.2307692307692308) internal successors, (32), 26 states have internal predecessors, (32), 3 states have call successors, (3), 1 states have call predecessors, (3), 1 states have return successors, (3), 3 states have call predecessors, (3), 3 states have call successors, (3) [2022-11-25 17:41:49,372 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 31 states to 31 states and 38 transitions. [2022-11-25 17:41:49,372 INFO L78 Accepts]: Start accepts. Automaton has 31 states and 38 transitions. Word has length 31 [2022-11-25 17:41:49,373 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-11-25 17:41:49,373 INFO L495 AbstractCegarLoop]: Abstraction has 31 states and 38 transitions. [2022-11-25 17:41:49,373 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 9 states, 9 states have (on average 3.6666666666666665) internal successors, (33), 9 states have internal predecessors, (33), 2 states have call successors, (7), 2 states have call predecessors, (7), 3 states have return successors, (7), 1 states have call predecessors, (7), 2 states have call successors, (7) [2022-11-25 17:41:49,374 INFO L276 IsEmpty]: Start isEmpty. Operand 31 states and 38 transitions. [2022-11-25 17:41:49,375 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 46 [2022-11-25 17:41:49,375 INFO L187 NwaCegarLoop]: Found error trace [2022-11-25 17:41:49,375 INFO L195 NwaCegarLoop]: trace histogram [3, 3, 3, 3, 3, 3, 3, 3, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-11-25 17:41:49,386 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_a460571b-f395-45fb-9a27-7e8e20061ee7/bin/uautomizer-ZsLfNo2U6R/z3 -smt2 -in SMTLIB2_COMPLIANT=true (2)] Forceful destruction successful, exit code 0 [2022-11-25 17:41:49,583 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable2,2 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_a460571b-f395-45fb-9a27-7e8e20061ee7/bin/uautomizer-ZsLfNo2U6R/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-11-25 17:41:49,584 INFO L420 AbstractCegarLoop]: === Iteration 4 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-11-25 17:41:49,584 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-11-25 17:41:49,585 INFO L85 PathProgramCache]: Analyzing trace with hash -1202663591, now seen corresponding path program 1 times [2022-11-25 17:41:49,585 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-11-25 17:41:49,585 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [560763832] [2022-11-25 17:41:49,585 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-25 17:41:49,585 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-11-25 17:41:49,660 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-25 17:41:49,769 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 8 [2022-11-25 17:41:49,775 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-25 17:41:49,805 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 19 [2022-11-25 17:41:49,811 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-25 17:41:49,834 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 32 [2022-11-25 17:41:49,838 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-25 17:41:49,844 INFO L134 CoverageAnalysis]: Checked inductivity of 40 backedges. 0 proven. 24 refuted. 0 times theorem prover too weak. 16 trivial. 0 not checked. [2022-11-25 17:41:49,845 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-11-25 17:41:49,845 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [560763832] [2022-11-25 17:41:49,845 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [560763832] provided 0 perfect and 1 imperfect interpolant sequences [2022-11-25 17:41:49,846 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1541766353] [2022-11-25 17:41:49,846 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-25 17:41:49,846 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-11-25 17:41:49,846 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_a460571b-f395-45fb-9a27-7e8e20061ee7/bin/uautomizer-ZsLfNo2U6R/z3 [2022-11-25 17:41:49,848 INFO L229 MonitoredProcess]: Starting monitored process 3 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_a460571b-f395-45fb-9a27-7e8e20061ee7/bin/uautomizer-ZsLfNo2U6R/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-11-25 17:41:49,874 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_a460571b-f395-45fb-9a27-7e8e20061ee7/bin/uautomizer-ZsLfNo2U6R/z3 -smt2 -in SMTLIB2_COMPLIANT=true (3)] Waiting until timeout for monitored process [2022-11-25 17:41:49,988 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-25 17:41:49,990 INFO L263 TraceCheckSpWp]: Trace formula consists of 197 conjuncts, 3 conjunts are in the unsatisfiable core [2022-11-25 17:41:49,997 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-11-25 17:41:50,124 INFO L134 CoverageAnalysis]: Checked inductivity of 40 backedges. 22 proven. 0 refuted. 0 times theorem prover too weak. 18 trivial. 0 not checked. [2022-11-25 17:41:50,125 INFO L324 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2022-11-25 17:41:50,136 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1541766353] provided 1 perfect and 0 imperfect interpolant sequences [2022-11-25 17:41:50,136 INFO L184 FreeRefinementEngine]: Found 1 perfect and 1 imperfect interpolant sequences. [2022-11-25 17:41:50,136 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [5] total 6 [2022-11-25 17:41:50,137 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [302908536] [2022-11-25 17:41:50,137 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-11-25 17:41:50,137 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 4 states [2022-11-25 17:41:50,138 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-11-25 17:41:50,138 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2022-11-25 17:41:50,139 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=12, Invalid=18, Unknown=0, NotChecked=0, Total=30 [2022-11-25 17:41:50,139 INFO L87 Difference]: Start difference. First operand 31 states and 38 transitions. Second operand has 4 states, 4 states have (on average 7.25) internal successors, (29), 4 states have internal predecessors, (29), 2 states have call successors, (3), 2 states have call predecessors, (3), 2 states have return successors, (3), 2 states have call predecessors, (3), 2 states have call successors, (3) [2022-11-25 17:41:50,191 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-11-25 17:41:50,194 INFO L93 Difference]: Finished difference Result 50 states and 61 transitions. [2022-11-25 17:41:50,194 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2022-11-25 17:41:50,195 INFO L78 Accepts]: Start accepts. Automaton has has 4 states, 4 states have (on average 7.25) internal successors, (29), 4 states have internal predecessors, (29), 2 states have call successors, (3), 2 states have call predecessors, (3), 2 states have return successors, (3), 2 states have call predecessors, (3), 2 states have call successors, (3) Word has length 45 [2022-11-25 17:41:50,195 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-11-25 17:41:50,198 INFO L225 Difference]: With dead ends: 50 [2022-11-25 17:41:50,199 INFO L226 Difference]: Without dead ends: 33 [2022-11-25 17:41:50,199 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 56 GetRequests, 51 SyntacticMatches, 1 SemanticMatches, 4 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 2 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=12, Invalid=18, Unknown=0, NotChecked=0, Total=30 [2022-11-25 17:41:50,200 INFO L413 NwaCegarLoop]: 26 mSDtfsCounter, 17 mSDsluCounter, 16 mSDsCounter, 0 mSdLazyCounter, 25 mSolverCounterSat, 0 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 17 SdHoareTripleChecker+Valid, 42 SdHoareTripleChecker+Invalid, 25 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 0 IncrementalHoareTripleChecker+Valid, 25 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.0s IncrementalHoareTripleChecker+Time [2022-11-25 17:41:50,202 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [17 Valid, 42 Invalid, 25 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [0 Valid, 25 Invalid, 0 Unknown, 0 Unchecked, 0.0s Time] [2022-11-25 17:41:50,203 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 33 states. [2022-11-25 17:41:50,209 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 33 to 32. [2022-11-25 17:41:50,211 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 32 states, 27 states have (on average 1.2222222222222223) internal successors, (33), 27 states have internal predecessors, (33), 3 states have call successors, (3), 1 states have call predecessors, (3), 1 states have return successors, (3), 3 states have call predecessors, (3), 3 states have call successors, (3) [2022-11-25 17:41:50,211 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 32 states to 32 states and 39 transitions. [2022-11-25 17:41:50,212 INFO L78 Accepts]: Start accepts. Automaton has 32 states and 39 transitions. Word has length 45 [2022-11-25 17:41:50,213 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-11-25 17:41:50,213 INFO L495 AbstractCegarLoop]: Abstraction has 32 states and 39 transitions. [2022-11-25 17:41:50,213 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 4 states, 4 states have (on average 7.25) internal successors, (29), 4 states have internal predecessors, (29), 2 states have call successors, (3), 2 states have call predecessors, (3), 2 states have return successors, (3), 2 states have call predecessors, (3), 2 states have call successors, (3) [2022-11-25 17:41:50,214 INFO L276 IsEmpty]: Start isEmpty. Operand 32 states and 39 transitions. [2022-11-25 17:41:50,214 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 48 [2022-11-25 17:41:50,215 INFO L187 NwaCegarLoop]: Found error trace [2022-11-25 17:41:50,215 INFO L195 NwaCegarLoop]: trace histogram [3, 3, 3, 3, 3, 3, 3, 3, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-11-25 17:41:50,226 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_a460571b-f395-45fb-9a27-7e8e20061ee7/bin/uautomizer-ZsLfNo2U6R/z3 -smt2 -in SMTLIB2_COMPLIANT=true (3)] Forceful destruction successful, exit code 0 [2022-11-25 17:41:50,415 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable3,3 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_a460571b-f395-45fb-9a27-7e8e20061ee7/bin/uautomizer-ZsLfNo2U6R/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-11-25 17:41:50,416 INFO L420 AbstractCegarLoop]: === Iteration 5 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-11-25 17:41:50,416 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-11-25 17:41:50,416 INFO L85 PathProgramCache]: Analyzing trace with hash 1233812759, now seen corresponding path program 1 times [2022-11-25 17:41:50,417 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-11-25 17:41:50,417 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [281998060] [2022-11-25 17:41:50,417 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-25 17:41:50,417 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-11-25 17:41:50,553 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-25 17:41:53,185 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 8 [2022-11-25 17:41:53,192 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-25 17:41:53,583 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 19 [2022-11-25 17:41:53,590 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-25 17:41:53,915 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 34 [2022-11-25 17:41:53,921 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-25 17:41:54,426 INFO L134 CoverageAnalysis]: Checked inductivity of 41 backedges. 0 proven. 33 refuted. 0 times theorem prover too weak. 8 trivial. 0 not checked. [2022-11-25 17:41:54,427 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-11-25 17:41:54,427 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [281998060] [2022-11-25 17:41:54,427 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [281998060] provided 0 perfect and 1 imperfect interpolant sequences [2022-11-25 17:41:54,427 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1161119694] [2022-11-25 17:41:54,428 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-25 17:41:54,428 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-11-25 17:41:54,428 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_a460571b-f395-45fb-9a27-7e8e20061ee7/bin/uautomizer-ZsLfNo2U6R/z3 [2022-11-25 17:41:54,429 INFO L229 MonitoredProcess]: Starting monitored process 4 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_a460571b-f395-45fb-9a27-7e8e20061ee7/bin/uautomizer-ZsLfNo2U6R/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-11-25 17:41:54,454 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_a460571b-f395-45fb-9a27-7e8e20061ee7/bin/uautomizer-ZsLfNo2U6R/z3 -smt2 -in SMTLIB2_COMPLIANT=true (4)] Waiting until timeout for monitored process [2022-11-25 17:41:54,554 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-25 17:41:54,558 INFO L263 TraceCheckSpWp]: Trace formula consists of 204 conjuncts, 100 conjunts are in the unsatisfiable core [2022-11-25 17:41:54,568 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-11-25 17:41:54,709 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 15 treesize of output 11 [2022-11-25 17:41:55,325 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-25 17:41:55,329 INFO L321 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2022-11-25 17:41:55,330 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 2 select indices, 2 select index equivalence classes, 1 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 1 case distinctions, treesize of input 84 treesize of output 46 [2022-11-25 17:41:56,283 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-25 17:41:56,285 INFO L321 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2022-11-25 17:41:56,286 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 0 stores, 2 select indices, 2 select index equivalence classes, 1 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 1 case distinctions, treesize of input 44 treesize of output 20 [2022-11-25 17:41:56,394 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 13 treesize of output 9 [2022-11-25 17:41:57,033 INFO L321 Elim1Store]: treesize reduction 7, result has 12.5 percent of original size [2022-11-25 17:41:57,034 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 1 case distinctions, treesize of input 57 treesize of output 33 [2022-11-25 17:41:57,150 INFO L134 CoverageAnalysis]: Checked inductivity of 41 backedges. 9 proven. 31 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2022-11-25 17:41:57,150 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-11-25 17:41:57,829 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 45 treesize of output 41 [2022-11-25 17:41:57,835 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 64 treesize of output 56 [2022-11-25 17:41:57,905 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 44 treesize of output 40 [2022-11-25 17:41:57,920 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 63 treesize of output 55 [2022-11-25 17:42:00,509 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 33 treesize of output 29 [2022-11-25 17:42:00,527 INFO L321 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2022-11-25 17:42:00,528 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 1 case distinctions, treesize of input 51 treesize of output 45 [2022-11-25 17:42:00,690 INFO L134 CoverageAnalysis]: Checked inductivity of 41 backedges. 8 proven. 29 refuted. 0 times theorem prover too weak. 4 trivial. 0 not checked. [2022-11-25 17:42:00,691 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1161119694] provided 0 perfect and 2 imperfect interpolant sequences [2022-11-25 17:42:00,691 INFO L184 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-11-25 17:42:00,691 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [26, 31, 29] total 79 [2022-11-25 17:42:00,691 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [973917407] [2022-11-25 17:42:00,691 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-11-25 17:42:00,692 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 79 states [2022-11-25 17:42:00,692 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-11-25 17:42:00,694 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 79 interpolants. [2022-11-25 17:42:00,696 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=514, Invalid=5648, Unknown=0, NotChecked=0, Total=6162 [2022-11-25 17:42:00,698 INFO L87 Difference]: Start difference. First operand 32 states and 39 transitions. Second operand has 79 states, 71 states have (on average 1.5633802816901408) internal successors, (111), 68 states have internal predecessors, (111), 8 states have call successors, (9), 4 states have call predecessors, (9), 8 states have return successors, (9), 8 states have call predecessors, (9), 8 states have call successors, (9) [2022-11-25 17:42:25,297 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-11-25 17:42:25,298 INFO L93 Difference]: Finished difference Result 344 states and 479 transitions. [2022-11-25 17:42:25,298 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 142 states. [2022-11-25 17:42:25,299 INFO L78 Accepts]: Start accepts. Automaton has has 79 states, 71 states have (on average 1.5633802816901408) internal successors, (111), 68 states have internal predecessors, (111), 8 states have call successors, (9), 4 states have call predecessors, (9), 8 states have return successors, (9), 8 states have call predecessors, (9), 8 states have call successors, (9) Word has length 47 [2022-11-25 17:42:25,299 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-11-25 17:42:25,304 INFO L225 Difference]: With dead ends: 344 [2022-11-25 17:42:25,304 INFO L226 Difference]: Without dead ends: 338 [2022-11-25 17:42:25,317 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 255 GetRequests, 50 SyntacticMatches, 2 SemanticMatches, 203 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 13763 ImplicationChecksByTransitivity, 23.2s TimeCoverageRelationStatistics Valid=4048, Invalid=37772, Unknown=0, NotChecked=0, Total=41820 [2022-11-25 17:42:25,318 INFO L413 NwaCegarLoop]: 29 mSDtfsCounter, 830 mSDsluCounter, 688 mSDsCounter, 0 mSdLazyCounter, 5405 mSolverCounterSat, 235 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 5.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 830 SdHoareTripleChecker+Valid, 717 SdHoareTripleChecker+Invalid, 5640 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.1s SdHoareTripleChecker+Time, 235 IncrementalHoareTripleChecker+Valid, 5405 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 5.7s IncrementalHoareTripleChecker+Time [2022-11-25 17:42:25,319 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [830 Valid, 717 Invalid, 5640 Unknown, 0 Unchecked, 0.1s Time], IncrementalHoareTripleChecker [235 Valid, 5405 Invalid, 0 Unknown, 0 Unchecked, 5.7s Time] [2022-11-25 17:42:25,320 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 338 states. [2022-11-25 17:42:25,353 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 338 to 159. [2022-11-25 17:42:25,354 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 159 states, 139 states have (on average 1.410071942446043) internal successors, (196), 145 states have internal predecessors, (196), 11 states have call successors, (11), 3 states have call predecessors, (11), 8 states have return successors, (29), 10 states have call predecessors, (29), 11 states have call successors, (29) [2022-11-25 17:42:25,356 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 159 states to 159 states and 236 transitions. [2022-11-25 17:42:25,356 INFO L78 Accepts]: Start accepts. Automaton has 159 states and 236 transitions. Word has length 47 [2022-11-25 17:42:25,357 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-11-25 17:42:25,357 INFO L495 AbstractCegarLoop]: Abstraction has 159 states and 236 transitions. [2022-11-25 17:42:25,357 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 79 states, 71 states have (on average 1.5633802816901408) internal successors, (111), 68 states have internal predecessors, (111), 8 states have call successors, (9), 4 states have call predecessors, (9), 8 states have return successors, (9), 8 states have call predecessors, (9), 8 states have call successors, (9) [2022-11-25 17:42:25,357 INFO L276 IsEmpty]: Start isEmpty. Operand 159 states and 236 transitions. [2022-11-25 17:42:25,360 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 49 [2022-11-25 17:42:25,360 INFO L187 NwaCegarLoop]: Found error trace [2022-11-25 17:42:25,361 INFO L195 NwaCegarLoop]: trace histogram [3, 3, 3, 3, 3, 3, 3, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-11-25 17:42:25,371 INFO L552 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_a460571b-f395-45fb-9a27-7e8e20061ee7/bin/uautomizer-ZsLfNo2U6R/z3 -smt2 -in SMTLIB2_COMPLIANT=true (4)] Ended with exit code 0 [2022-11-25 17:42:25,566 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable4,4 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_a460571b-f395-45fb-9a27-7e8e20061ee7/bin/uautomizer-ZsLfNo2U6R/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-11-25 17:42:25,567 INFO L420 AbstractCegarLoop]: === Iteration 6 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-11-25 17:42:25,567 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-11-25 17:42:25,567 INFO L85 PathProgramCache]: Analyzing trace with hash -1417861200, now seen corresponding path program 1 times [2022-11-25 17:42:25,567 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-11-25 17:42:25,568 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1644126082] [2022-11-25 17:42:25,568 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-25 17:42:25,568 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-11-25 17:42:25,620 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-25 17:42:26,429 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 8 [2022-11-25 17:42:26,433 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-25 17:42:26,511 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 19 [2022-11-25 17:42:26,514 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-25 17:42:26,557 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 34 [2022-11-25 17:42:26,560 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-25 17:42:26,604 INFO L134 CoverageAnalysis]: Checked inductivity of 41 backedges. 0 proven. 22 refuted. 0 times theorem prover too weak. 19 trivial. 0 not checked. [2022-11-25 17:42:26,604 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-11-25 17:42:26,605 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1644126082] [2022-11-25 17:42:26,605 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1644126082] provided 0 perfect and 1 imperfect interpolant sequences [2022-11-25 17:42:26,605 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [39267142] [2022-11-25 17:42:26,605 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-25 17:42:26,605 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-11-25 17:42:26,606 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_a460571b-f395-45fb-9a27-7e8e20061ee7/bin/uautomizer-ZsLfNo2U6R/z3 [2022-11-25 17:42:26,611 INFO L229 MonitoredProcess]: Starting monitored process 5 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_a460571b-f395-45fb-9a27-7e8e20061ee7/bin/uautomizer-ZsLfNo2U6R/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-11-25 17:42:26,639 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_a460571b-f395-45fb-9a27-7e8e20061ee7/bin/uautomizer-ZsLfNo2U6R/z3 -smt2 -in SMTLIB2_COMPLIANT=true (5)] Waiting until timeout for monitored process [2022-11-25 17:42:26,704 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-25 17:42:26,730 INFO L263 TraceCheckSpWp]: Trace formula consists of 205 conjuncts, 55 conjunts are in the unsatisfiable core [2022-11-25 17:42:26,734 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-11-25 17:42:26,793 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-25 17:42:26,794 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 1 select indices, 1 select index equivalence classes, 1 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 28 treesize of output 20 [2022-11-25 17:42:27,045 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-25 17:42:27,047 INFO L321 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2022-11-25 17:42:27,048 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 2 select indices, 2 select index equivalence classes, 1 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 1 case distinctions, treesize of input 41 treesize of output 26 [2022-11-25 17:42:27,108 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-25 17:42:27,127 INFO L321 Elim1Store]: treesize reduction 42, result has 28.8 percent of original size [2022-11-25 17:42:27,127 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 2 select indices, 2 select index equivalence classes, 1 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 3 case distinctions, treesize of input 39 treesize of output 35 [2022-11-25 17:42:30,545 INFO L134 CoverageAnalysis]: Checked inductivity of 41 backedges. 15 proven. 22 refuted. 0 times theorem prover too weak. 4 trivial. 0 not checked. [2022-11-25 17:42:30,545 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-11-25 17:42:30,927 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [39267142] provided 0 perfect and 1 imperfect interpolant sequences [2022-11-25 17:42:30,927 INFO L184 FreeRefinementEngine]: Found 0 perfect and 2 imperfect interpolant sequences. [2022-11-25 17:42:30,927 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [14, 17] total 26 [2022-11-25 17:42:30,928 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1026911030] [2022-11-25 17:42:30,928 INFO L85 oduleStraightlineAll]: Using 2 imperfect interpolants to construct interpolant automaton [2022-11-25 17:42:30,928 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 26 states [2022-11-25 17:42:30,928 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-11-25 17:42:30,929 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 26 interpolants. [2022-11-25 17:42:30,930 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=161, Invalid=827, Unknown=4, NotChecked=0, Total=992 [2022-11-25 17:42:30,930 INFO L87 Difference]: Start difference. First operand 159 states and 236 transitions. Second operand has 26 states, 23 states have (on average 2.5652173913043477) internal successors, (59), 21 states have internal predecessors, (59), 6 states have call successors, (6), 3 states have call predecessors, (6), 4 states have return successors, (6), 5 states have call predecessors, (6), 6 states have call successors, (6) [2022-11-25 17:42:34,362 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-11-25 17:42:34,362 INFO L93 Difference]: Finished difference Result 586 states and 840 transitions. [2022-11-25 17:42:34,363 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 28 states. [2022-11-25 17:42:34,363 INFO L78 Accepts]: Start accepts. Automaton has has 26 states, 23 states have (on average 2.5652173913043477) internal successors, (59), 21 states have internal predecessors, (59), 6 states have call successors, (6), 3 states have call predecessors, (6), 4 states have return successors, (6), 5 states have call predecessors, (6), 6 states have call successors, (6) Word has length 48 [2022-11-25 17:42:34,364 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-11-25 17:42:34,368 INFO L225 Difference]: With dead ends: 586 [2022-11-25 17:42:34,369 INFO L226 Difference]: Without dead ends: 516 [2022-11-25 17:42:34,376 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 109 GetRequests, 61 SyntacticMatches, 0 SemanticMatches, 48 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 659 ImplicationChecksByTransitivity, 6.4s TimeCoverageRelationStatistics Valid=382, Invalid=2064, Unknown=4, NotChecked=0, Total=2450 [2022-11-25 17:42:34,377 INFO L413 NwaCegarLoop]: 59 mSDtfsCounter, 136 mSDsluCounter, 306 mSDsCounter, 0 mSdLazyCounter, 426 mSolverCounterSat, 49 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.7s Time, 0 mProtectedPredicate, 0 mProtectedAction, 137 SdHoareTripleChecker+Valid, 365 SdHoareTripleChecker+Invalid, 475 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 49 IncrementalHoareTripleChecker+Valid, 426 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.7s IncrementalHoareTripleChecker+Time [2022-11-25 17:42:34,378 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [137 Valid, 365 Invalid, 475 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [49 Valid, 426 Invalid, 0 Unknown, 0 Unchecked, 0.7s Time] [2022-11-25 17:42:34,379 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 516 states. [2022-11-25 17:42:34,450 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 516 to 371. [2022-11-25 17:42:34,452 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 371 states, 332 states have (on average 1.4096385542168675) internal successors, (468), 342 states have internal predecessors, (468), 19 states have call successors, (19), 11 states have call predecessors, (19), 19 states have return successors, (53), 17 states have call predecessors, (53), 19 states have call successors, (53) [2022-11-25 17:42:34,456 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 371 states to 371 states and 540 transitions. [2022-11-25 17:42:34,456 INFO L78 Accepts]: Start accepts. Automaton has 371 states and 540 transitions. Word has length 48 [2022-11-25 17:42:34,456 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-11-25 17:42:34,457 INFO L495 AbstractCegarLoop]: Abstraction has 371 states and 540 transitions. [2022-11-25 17:42:34,457 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 26 states, 23 states have (on average 2.5652173913043477) internal successors, (59), 21 states have internal predecessors, (59), 6 states have call successors, (6), 3 states have call predecessors, (6), 4 states have return successors, (6), 5 states have call predecessors, (6), 6 states have call successors, (6) [2022-11-25 17:42:34,457 INFO L276 IsEmpty]: Start isEmpty. Operand 371 states and 540 transitions. [2022-11-25 17:42:34,462 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 49 [2022-11-25 17:42:34,462 INFO L187 NwaCegarLoop]: Found error trace [2022-11-25 17:42:34,463 INFO L195 NwaCegarLoop]: trace histogram [3, 3, 3, 3, 3, 3, 3, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-11-25 17:42:34,482 INFO L552 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_a460571b-f395-45fb-9a27-7e8e20061ee7/bin/uautomizer-ZsLfNo2U6R/z3 -smt2 -in SMTLIB2_COMPLIANT=true (5)] Ended with exit code 0 [2022-11-25 17:42:34,674 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 5 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_a460571b-f395-45fb-9a27-7e8e20061ee7/bin/uautomizer-ZsLfNo2U6R/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable5 [2022-11-25 17:42:34,675 INFO L420 AbstractCegarLoop]: === Iteration 7 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-11-25 17:42:34,675 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-11-25 17:42:34,675 INFO L85 PathProgramCache]: Analyzing trace with hash -557208068, now seen corresponding path program 2 times [2022-11-25 17:42:34,675 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-11-25 17:42:34,676 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [737721147] [2022-11-25 17:42:34,676 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-25 17:42:34,676 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-11-25 17:42:34,751 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-25 17:42:37,680 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 8 [2022-11-25 17:42:37,686 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-25 17:42:38,023 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 19 [2022-11-25 17:42:38,029 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-25 17:42:38,370 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 35 [2022-11-25 17:42:38,375 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-25 17:42:38,845 INFO L134 CoverageAnalysis]: Checked inductivity of 41 backedges. 0 proven. 38 refuted. 0 times theorem prover too weak. 3 trivial. 0 not checked. [2022-11-25 17:42:38,845 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-11-25 17:42:38,845 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [737721147] [2022-11-25 17:42:38,845 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [737721147] provided 0 perfect and 1 imperfect interpolant sequences [2022-11-25 17:42:38,845 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1412891398] [2022-11-25 17:42:38,845 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 [2022-11-25 17:42:38,846 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-11-25 17:42:38,846 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_a460571b-f395-45fb-9a27-7e8e20061ee7/bin/uautomizer-ZsLfNo2U6R/z3 [2022-11-25 17:42:38,847 INFO L229 MonitoredProcess]: Starting monitored process 6 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_a460571b-f395-45fb-9a27-7e8e20061ee7/bin/uautomizer-ZsLfNo2U6R/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-11-25 17:42:38,883 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_a460571b-f395-45fb-9a27-7e8e20061ee7/bin/uautomizer-ZsLfNo2U6R/z3 -smt2 -in SMTLIB2_COMPLIANT=true (6)] Waiting until timeout for monitored process [2022-11-25 17:42:38,971 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2022-11-25 17:42:38,972 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-11-25 17:42:38,975 INFO L263 TraceCheckSpWp]: Trace formula consists of 205 conjuncts, 86 conjunts are in the unsatisfiable core [2022-11-25 17:42:38,982 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-11-25 17:42:39,028 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 15 treesize of output 11 [2022-11-25 17:42:39,744 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-25 17:42:39,746 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 1 select indices, 1 select index equivalence classes, 1 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 73 treesize of output 43 [2022-11-25 17:42:40,462 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 92 treesize of output 56 [2022-11-25 17:42:40,753 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 16 treesize of output 12 [2022-11-25 17:42:41,387 INFO L321 Elim1Store]: treesize reduction 12, result has 63.6 percent of original size [2022-11-25 17:42:41,388 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 0 stores, 3 select indices, 3 select index equivalence classes, 0 disjoint index pairs (out of 3 index pairs), introduced 3 new quantified variables, introduced 3 case distinctions, treesize of input 145 treesize of output 101 [2022-11-25 17:42:41,884 INFO L134 CoverageAnalysis]: Checked inductivity of 41 backedges. 0 proven. 38 refuted. 0 times theorem prover too weak. 3 trivial. 0 not checked. [2022-11-25 17:42:41,884 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-11-25 17:42:42,659 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 45 treesize of output 41 [2022-11-25 17:42:42,663 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 64 treesize of output 56 [2022-11-25 17:42:42,719 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 44 treesize of output 40 [2022-11-25 17:42:42,725 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 63 treesize of output 55 [2022-11-25 17:42:44,972 INFO L134 CoverageAnalysis]: Checked inductivity of 41 backedges. 8 proven. 28 refuted. 0 times theorem prover too weak. 5 trivial. 0 not checked. [2022-11-25 17:42:44,972 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1412891398] provided 0 perfect and 2 imperfect interpolant sequences [2022-11-25 17:42:44,972 INFO L184 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-11-25 17:42:44,973 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [31, 27, 26] total 74 [2022-11-25 17:42:44,973 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1365355011] [2022-11-25 17:42:44,973 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-11-25 17:42:44,974 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 74 states [2022-11-25 17:42:44,975 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-11-25 17:42:44,979 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 74 interpolants. [2022-11-25 17:42:44,981 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=327, Invalid=5075, Unknown=0, NotChecked=0, Total=5402 [2022-11-25 17:42:44,981 INFO L87 Difference]: Start difference. First operand 371 states and 540 transitions. Second operand has 74 states, 66 states have (on average 1.7272727272727273) internal successors, (114), 66 states have internal predecessors, (114), 9 states have call successors, (9), 2 states have call predecessors, (9), 8 states have return successors, (9), 8 states have call predecessors, (9), 9 states have call successors, (9) [2022-11-25 17:42:57,310 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-11-25 17:42:57,311 INFO L93 Difference]: Finished difference Result 1132 states and 1654 transitions. [2022-11-25 17:42:57,311 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 71 states. [2022-11-25 17:42:57,311 INFO L78 Accepts]: Start accepts. Automaton has has 74 states, 66 states have (on average 1.7272727272727273) internal successors, (114), 66 states have internal predecessors, (114), 9 states have call successors, (9), 2 states have call predecessors, (9), 8 states have return successors, (9), 8 states have call predecessors, (9), 9 states have call successors, (9) Word has length 48 [2022-11-25 17:42:57,312 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-11-25 17:42:57,317 INFO L225 Difference]: With dead ends: 1132 [2022-11-25 17:42:57,317 INFO L226 Difference]: Without dead ends: 803 [2022-11-25 17:42:57,322 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 191 GetRequests, 53 SyntacticMatches, 6 SemanticMatches, 132 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 4321 ImplicationChecksByTransitivity, 13.7s TimeCoverageRelationStatistics Valid=1369, Invalid=16453, Unknown=0, NotChecked=0, Total=17822 [2022-11-25 17:42:57,323 INFO L413 NwaCegarLoop]: 24 mSDtfsCounter, 522 mSDsluCounter, 590 mSDsCounter, 0 mSdLazyCounter, 2928 mSolverCounterSat, 169 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 3.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 522 SdHoareTripleChecker+Valid, 614 SdHoareTripleChecker+Invalid, 3097 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 169 IncrementalHoareTripleChecker+Valid, 2928 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 3.4s IncrementalHoareTripleChecker+Time [2022-11-25 17:42:57,323 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [522 Valid, 614 Invalid, 3097 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [169 Valid, 2928 Invalid, 0 Unknown, 0 Unchecked, 3.4s Time] [2022-11-25 17:42:57,324 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 803 states. [2022-11-25 17:42:57,420 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 803 to 500. [2022-11-25 17:42:57,422 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 500 states, 459 states have (on average 1.4161220043572984) internal successors, (650), 470 states have internal predecessors, (650), 20 states have call successors, (20), 12 states have call predecessors, (20), 20 states have return successors, (54), 17 states have call predecessors, (54), 20 states have call successors, (54) [2022-11-25 17:42:57,425 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 500 states to 500 states and 724 transitions. [2022-11-25 17:42:57,425 INFO L78 Accepts]: Start accepts. Automaton has 500 states and 724 transitions. Word has length 48 [2022-11-25 17:42:57,426 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-11-25 17:42:57,426 INFO L495 AbstractCegarLoop]: Abstraction has 500 states and 724 transitions. [2022-11-25 17:42:57,426 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 74 states, 66 states have (on average 1.7272727272727273) internal successors, (114), 66 states have internal predecessors, (114), 9 states have call successors, (9), 2 states have call predecessors, (9), 8 states have return successors, (9), 8 states have call predecessors, (9), 9 states have call successors, (9) [2022-11-25 17:42:57,427 INFO L276 IsEmpty]: Start isEmpty. Operand 500 states and 724 transitions. [2022-11-25 17:42:57,430 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 49 [2022-11-25 17:42:57,430 INFO L187 NwaCegarLoop]: Found error trace [2022-11-25 17:42:57,430 INFO L195 NwaCegarLoop]: trace histogram [3, 3, 3, 3, 3, 3, 3, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-11-25 17:42:57,443 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_a460571b-f395-45fb-9a27-7e8e20061ee7/bin/uautomizer-ZsLfNo2U6R/z3 -smt2 -in SMTLIB2_COMPLIANT=true (6)] Forceful destruction successful, exit code 0 [2022-11-25 17:42:57,636 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable6,6 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_a460571b-f395-45fb-9a27-7e8e20061ee7/bin/uautomizer-ZsLfNo2U6R/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-11-25 17:42:57,636 INFO L420 AbstractCegarLoop]: === Iteration 8 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-11-25 17:42:57,637 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-11-25 17:42:57,637 INFO L85 PathProgramCache]: Analyzing trace with hash -1874598368, now seen corresponding path program 3 times [2022-11-25 17:42:57,637 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-11-25 17:42:57,637 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1854289346] [2022-11-25 17:42:57,638 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-25 17:42:57,638 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-11-25 17:42:57,674 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-25 17:42:58,161 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 8 [2022-11-25 17:42:58,167 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-25 17:42:58,236 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 20 [2022-11-25 17:42:58,238 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-25 17:42:58,244 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 35 [2022-11-25 17:42:58,247 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-25 17:42:58,291 INFO L134 CoverageAnalysis]: Checked inductivity of 41 backedges. 10 proven. 21 refuted. 0 times theorem prover too weak. 10 trivial. 0 not checked. [2022-11-25 17:42:58,291 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-11-25 17:42:58,291 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1854289346] [2022-11-25 17:42:58,293 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1854289346] provided 0 perfect and 1 imperfect interpolant sequences [2022-11-25 17:42:58,294 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [950229274] [2022-11-25 17:42:58,294 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 [2022-11-25 17:42:58,294 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-11-25 17:42:58,294 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_a460571b-f395-45fb-9a27-7e8e20061ee7/bin/uautomizer-ZsLfNo2U6R/z3 [2022-11-25 17:42:58,295 INFO L229 MonitoredProcess]: Starting monitored process 7 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_a460571b-f395-45fb-9a27-7e8e20061ee7/bin/uautomizer-ZsLfNo2U6R/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-11-25 17:42:58,311 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_a460571b-f395-45fb-9a27-7e8e20061ee7/bin/uautomizer-ZsLfNo2U6R/z3 -smt2 -in SMTLIB2_COMPLIANT=true (7)] Waiting until timeout for monitored process [2022-11-25 17:42:58,437 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 5 check-sat command(s) [2022-11-25 17:42:58,438 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-11-25 17:42:58,440 INFO L263 TraceCheckSpWp]: Trace formula consists of 205 conjuncts, 40 conjunts are in the unsatisfiable core [2022-11-25 17:42:58,449 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-11-25 17:42:58,596 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-25 17:42:58,599 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 1 select indices, 1 select index equivalence classes, 1 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 29 treesize of output 21 [2022-11-25 17:42:58,752 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-25 17:42:58,753 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 1 select indices, 1 select index equivalence classes, 1 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 28 treesize of output 21 [2022-11-25 17:42:58,818 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-25 17:42:58,819 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-25 17:42:58,832 INFO L321 Elim1Store]: treesize reduction 17, result has 46.9 percent of original size [2022-11-25 17:42:58,833 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 2 select indices, 2 select index equivalence classes, 2 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 2 case distinctions, treesize of input 40 treesize of output 42 [2022-11-25 17:42:58,954 INFO L134 CoverageAnalysis]: Checked inductivity of 41 backedges. 1 proven. 35 refuted. 0 times theorem prover too weak. 5 trivial. 0 not checked. [2022-11-25 17:42:58,954 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-11-25 17:43:03,207 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [950229274] provided 0 perfect and 1 imperfect interpolant sequences [2022-11-25 17:43:03,207 INFO L184 FreeRefinementEngine]: Found 0 perfect and 2 imperfect interpolant sequences. [2022-11-25 17:43:03,208 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [13, 15] total 22 [2022-11-25 17:43:03,208 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [617737186] [2022-11-25 17:43:03,208 INFO L85 oduleStraightlineAll]: Using 2 imperfect interpolants to construct interpolant automaton [2022-11-25 17:43:03,209 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 22 states [2022-11-25 17:43:03,209 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-11-25 17:43:03,210 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 22 interpolants. [2022-11-25 17:43:03,210 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=112, Invalid=588, Unknown=2, NotChecked=0, Total=702 [2022-11-25 17:43:03,211 INFO L87 Difference]: Start difference. First operand 500 states and 724 transitions. Second operand has 22 states, 21 states have (on average 3.238095238095238) internal successors, (68), 19 states have internal predecessors, (68), 3 states have call successors, (6), 4 states have call predecessors, (6), 6 states have return successors, (6), 3 states have call predecessors, (6), 3 states have call successors, (6) [2022-11-25 17:43:05,234 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.00s for a HTC check with result UNKNOWN. Formula has sorts [Array, Bool, Int], hasArrays=true, hasNonlinArith=false, quantifiers [0] [2022-11-25 17:43:07,270 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.00s for a HTC check with result UNKNOWN. Formula has sorts [Array, Bool, Int], hasArrays=true, hasNonlinArith=false, quantifiers [0] [2022-11-25 17:43:09,284 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.00s for a HTC check with result UNKNOWN. Formula has sorts [Array, Bool, Int], hasArrays=true, hasNonlinArith=false, quantifiers [0] [2022-11-25 17:43:11,298 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.01s for a HTC check with result UNKNOWN. Formula has sorts [Array, Bool, Int], hasArrays=true, hasNonlinArith=false, quantifiers [0] [2022-11-25 17:43:13,584 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.00s for a HTC check with result UNKNOWN. Formula has sorts [Array, Bool, Int], hasArrays=true, hasNonlinArith=false, quantifiers [0] [2022-11-25 17:43:15,597 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.00s for a HTC check with result UNKNOWN. Formula has sorts [Array, Bool, Int], hasArrays=true, hasNonlinArith=false, quantifiers [0] [2022-11-25 17:43:18,013 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.00s for a HTC check with result UNKNOWN. Formula has sorts [Array, Bool, Int], hasArrays=true, hasNonlinArith=false, quantifiers [0] [2022-11-25 17:43:20,021 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.00s for a HTC check with result UNKNOWN. Formula has sorts [Array, Bool, Int], hasArrays=true, hasNonlinArith=false, quantifiers [0] [2022-11-25 17:43:22,119 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.00s for a HTC check with result UNKNOWN. Formula has sorts [Array, Bool, Int], hasArrays=true, hasNonlinArith=false, quantifiers [0] [2022-11-25 17:43:24,129 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.00s for a HTC check with result UNKNOWN. Formula has sorts [Array, Bool, Int], hasArrays=true, hasNonlinArith=false, quantifiers [0] [2022-11-25 17:43:26,226 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.00s for a HTC check with result UNKNOWN. Formula has sorts [Array, Bool, Int], hasArrays=true, hasNonlinArith=false, quantifiers [0] [2022-11-25 17:43:28,234 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.00s for a HTC check with result UNKNOWN. Formula has sorts [Array, Bool, Int], hasArrays=true, hasNonlinArith=false, quantifiers [0] [2022-11-25 17:43:30,245 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.00s for a HTC check with result UNKNOWN. Formula has sorts [Array, Bool, Int], hasArrays=true, hasNonlinArith=false, quantifiers [0] [2022-11-25 17:43:32,268 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.00s for a HTC check with result UNKNOWN. Formula has sorts [Array, Bool, Int], hasArrays=true, hasNonlinArith=false, quantifiers [0] [2022-11-25 17:43:34,317 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.00s for a HTC check with result UNKNOWN. Formula has sorts [Array, Bool, Int], hasArrays=true, hasNonlinArith=false, quantifiers [0] [2022-11-25 17:43:36,362 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.00s for a HTC check with result UNKNOWN. Formula has sorts [Array, Bool, Int], hasArrays=true, hasNonlinArith=false, quantifiers [0] [2022-11-25 17:43:36,496 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-11-25 17:43:36,496 INFO L93 Difference]: Finished difference Result 873 states and 1234 transitions. [2022-11-25 17:43:36,497 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 29 states. [2022-11-25 17:43:36,497 INFO L78 Accepts]: Start accepts. Automaton has has 22 states, 21 states have (on average 3.238095238095238) internal successors, (68), 19 states have internal predecessors, (68), 3 states have call successors, (6), 4 states have call predecessors, (6), 6 states have return successors, (6), 3 states have call predecessors, (6), 3 states have call successors, (6) Word has length 48 [2022-11-25 17:43:36,498 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-11-25 17:43:36,502 INFO L225 Difference]: With dead ends: 873 [2022-11-25 17:43:36,502 INFO L226 Difference]: Without dead ends: 776 [2022-11-25 17:43:36,503 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 108 GetRequests, 63 SyntacticMatches, 2 SemanticMatches, 43 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 464 ImplicationChecksByTransitivity, 5.0s TimeCoverageRelationStatistics Valid=313, Invalid=1665, Unknown=2, NotChecked=0, Total=1980 [2022-11-25 17:43:36,504 INFO L413 NwaCegarLoop]: 54 mSDtfsCounter, 109 mSDsluCounter, 450 mSDsCounter, 0 mSdLazyCounter, 724 mSolverCounterSat, 16 mSolverCounterUnsat, 16 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 32.6s Time, 0 mProtectedPredicate, 0 mProtectedAction, 113 SdHoareTripleChecker+Valid, 504 SdHoareTripleChecker+Invalid, 756 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 16 IncrementalHoareTripleChecker+Valid, 724 IncrementalHoareTripleChecker+Invalid, 16 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 32.7s IncrementalHoareTripleChecker+Time [2022-11-25 17:43:36,504 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [113 Valid, 504 Invalid, 756 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [16 Valid, 724 Invalid, 16 Unknown, 0 Unchecked, 32.7s Time] [2022-11-25 17:43:36,506 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 776 states. [2022-11-25 17:43:36,598 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 776 to 628. [2022-11-25 17:43:36,600 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 628 states, 580 states have (on average 1.4258620689655173) internal successors, (827), 594 states have internal predecessors, (827), 22 states have call successors, (22), 16 states have call predecessors, (22), 25 states have return successors, (49), 17 states have call predecessors, (49), 22 states have call successors, (49) [2022-11-25 17:43:36,604 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 628 states to 628 states and 898 transitions. [2022-11-25 17:43:36,605 INFO L78 Accepts]: Start accepts. Automaton has 628 states and 898 transitions. Word has length 48 [2022-11-25 17:43:36,605 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-11-25 17:43:36,605 INFO L495 AbstractCegarLoop]: Abstraction has 628 states and 898 transitions. [2022-11-25 17:43:36,606 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 22 states, 21 states have (on average 3.238095238095238) internal successors, (68), 19 states have internal predecessors, (68), 3 states have call successors, (6), 4 states have call predecessors, (6), 6 states have return successors, (6), 3 states have call predecessors, (6), 3 states have call successors, (6) [2022-11-25 17:43:36,606 INFO L276 IsEmpty]: Start isEmpty. Operand 628 states and 898 transitions. [2022-11-25 17:43:36,608 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 50 [2022-11-25 17:43:36,608 INFO L187 NwaCegarLoop]: Found error trace [2022-11-25 17:43:36,609 INFO L195 NwaCegarLoop]: trace histogram [3, 3, 3, 3, 3, 3, 3, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-11-25 17:43:36,615 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_a460571b-f395-45fb-9a27-7e8e20061ee7/bin/uautomizer-ZsLfNo2U6R/z3 -smt2 -in SMTLIB2_COMPLIANT=true (7)] Forceful destruction successful, exit code 0 [2022-11-25 17:43:36,815 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable7,7 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_a460571b-f395-45fb-9a27-7e8e20061ee7/bin/uautomizer-ZsLfNo2U6R/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-11-25 17:43:36,816 INFO L420 AbstractCegarLoop]: === Iteration 9 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-11-25 17:43:36,816 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-11-25 17:43:36,816 INFO L85 PathProgramCache]: Analyzing trace with hash -1899842370, now seen corresponding path program 1 times [2022-11-25 17:43:36,816 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-11-25 17:43:36,816 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1535732087] [2022-11-25 17:43:36,816 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-25 17:43:36,817 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-11-25 17:43:36,841 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-25 17:43:37,069 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 8 [2022-11-25 17:43:37,072 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-25 17:43:37,127 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 19 [2022-11-25 17:43:37,130 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-25 17:43:37,254 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 36 [2022-11-25 17:43:37,256 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-25 17:43:37,260 INFO L134 CoverageAnalysis]: Checked inductivity of 41 backedges. 0 proven. 32 refuted. 0 times theorem prover too weak. 9 trivial. 0 not checked. [2022-11-25 17:43:37,260 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-11-25 17:43:37,261 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1535732087] [2022-11-25 17:43:37,261 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1535732087] provided 0 perfect and 1 imperfect interpolant sequences [2022-11-25 17:43:37,261 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [422460847] [2022-11-25 17:43:37,261 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-25 17:43:37,262 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-11-25 17:43:37,262 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_a460571b-f395-45fb-9a27-7e8e20061ee7/bin/uautomizer-ZsLfNo2U6R/z3 [2022-11-25 17:43:37,263 INFO L229 MonitoredProcess]: Starting monitored process 8 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_a460571b-f395-45fb-9a27-7e8e20061ee7/bin/uautomizer-ZsLfNo2U6R/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-11-25 17:43:37,272 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_a460571b-f395-45fb-9a27-7e8e20061ee7/bin/uautomizer-ZsLfNo2U6R/z3 -smt2 -in SMTLIB2_COMPLIANT=true (8)] Waiting until timeout for monitored process [2022-11-25 17:43:37,371 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-25 17:43:37,372 INFO L263 TraceCheckSpWp]: Trace formula consists of 206 conjuncts, 33 conjunts are in the unsatisfiable core [2022-11-25 17:43:37,377 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-11-25 17:43:37,421 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-25 17:43:37,423 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 1 select indices, 1 select index equivalence classes, 1 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 28 treesize of output 20 [2022-11-25 17:43:37,604 INFO L134 CoverageAnalysis]: Checked inductivity of 41 backedges. 23 proven. 12 refuted. 0 times theorem prover too weak. 6 trivial. 0 not checked. [2022-11-25 17:43:37,604 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-11-25 17:43:37,852 INFO L134 CoverageAnalysis]: Checked inductivity of 41 backedges. 2 proven. 30 refuted. 0 times theorem prover too weak. 9 trivial. 0 not checked. [2022-11-25 17:43:37,853 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [422460847] provided 0 perfect and 2 imperfect interpolant sequences [2022-11-25 17:43:37,853 INFO L184 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-11-25 17:43:37,853 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [11, 11, 9] total 20 [2022-11-25 17:43:37,853 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1911491285] [2022-11-25 17:43:37,853 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-11-25 17:43:37,854 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 20 states [2022-11-25 17:43:37,854 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-11-25 17:43:37,854 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 20 interpolants. [2022-11-25 17:43:37,855 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=60, Invalid=320, Unknown=0, NotChecked=0, Total=380 [2022-11-25 17:43:37,855 INFO L87 Difference]: Start difference. First operand 628 states and 898 transitions. Second operand has 20 states, 18 states have (on average 4.055555555555555) internal successors, (73), 17 states have internal predecessors, (73), 5 states have call successors, (7), 3 states have call predecessors, (7), 5 states have return successors, (7), 3 states have call predecessors, (7), 5 states have call successors, (7) [2022-11-25 17:43:38,896 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-11-25 17:43:38,896 INFO L93 Difference]: Finished difference Result 1016 states and 1405 transitions. [2022-11-25 17:43:38,897 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 35 states. [2022-11-25 17:43:38,897 INFO L78 Accepts]: Start accepts. Automaton has has 20 states, 18 states have (on average 4.055555555555555) internal successors, (73), 17 states have internal predecessors, (73), 5 states have call successors, (7), 3 states have call predecessors, (7), 5 states have return successors, (7), 3 states have call predecessors, (7), 5 states have call successors, (7) Word has length 49 [2022-11-25 17:43:38,900 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-11-25 17:43:38,905 INFO L225 Difference]: With dead ends: 1016 [2022-11-25 17:43:38,908 INFO L226 Difference]: Without dead ends: 818 [2022-11-25 17:43:38,909 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 138 GetRequests, 97 SyntacticMatches, 0 SemanticMatches, 41 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 412 ImplicationChecksByTransitivity, 0.7s TimeCoverageRelationStatistics Valid=304, Invalid=1502, Unknown=0, NotChecked=0, Total=1806 [2022-11-25 17:43:38,913 INFO L413 NwaCegarLoop]: 52 mSDtfsCounter, 132 mSDsluCounter, 414 mSDsCounter, 0 mSdLazyCounter, 507 mSolverCounterSat, 10 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.4s Time, 0 mProtectedPredicate, 0 mProtectedAction, 138 SdHoareTripleChecker+Valid, 466 SdHoareTripleChecker+Invalid, 517 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 10 IncrementalHoareTripleChecker+Valid, 507 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.5s IncrementalHoareTripleChecker+Time [2022-11-25 17:43:38,913 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [138 Valid, 466 Invalid, 517 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [10 Valid, 507 Invalid, 0 Unknown, 0 Unchecked, 0.5s Time] [2022-11-25 17:43:38,915 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 818 states. [2022-11-25 17:43:39,005 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 818 to 619. [2022-11-25 17:43:39,006 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 619 states, 571 states have (on average 1.4185639229422067) internal successors, (810), 585 states have internal predecessors, (810), 22 states have call successors, (22), 16 states have call predecessors, (22), 25 states have return successors, (49), 17 states have call predecessors, (49), 22 states have call successors, (49) [2022-11-25 17:43:39,010 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 619 states to 619 states and 881 transitions. [2022-11-25 17:43:39,011 INFO L78 Accepts]: Start accepts. Automaton has 619 states and 881 transitions. Word has length 49 [2022-11-25 17:43:39,011 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-11-25 17:43:39,011 INFO L495 AbstractCegarLoop]: Abstraction has 619 states and 881 transitions. [2022-11-25 17:43:39,011 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 20 states, 18 states have (on average 4.055555555555555) internal successors, (73), 17 states have internal predecessors, (73), 5 states have call successors, (7), 3 states have call predecessors, (7), 5 states have return successors, (7), 3 states have call predecessors, (7), 5 states have call successors, (7) [2022-11-25 17:43:39,012 INFO L276 IsEmpty]: Start isEmpty. Operand 619 states and 881 transitions. [2022-11-25 17:43:39,015 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 50 [2022-11-25 17:43:39,015 INFO L187 NwaCegarLoop]: Found error trace [2022-11-25 17:43:39,015 INFO L195 NwaCegarLoop]: trace histogram [3, 3, 3, 3, 3, 3, 3, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-11-25 17:43:39,031 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_a460571b-f395-45fb-9a27-7e8e20061ee7/bin/uautomizer-ZsLfNo2U6R/z3 -smt2 -in SMTLIB2_COMPLIANT=true (8)] Forceful destruction successful, exit code 0 [2022-11-25 17:43:39,232 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 8 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_a460571b-f395-45fb-9a27-7e8e20061ee7/bin/uautomizer-ZsLfNo2U6R/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable8 [2022-11-25 17:43:39,232 INFO L420 AbstractCegarLoop]: === Iteration 10 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-11-25 17:43:39,232 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-11-25 17:43:39,232 INFO L85 PathProgramCache]: Analyzing trace with hash 1005641671, now seen corresponding path program 4 times [2022-11-25 17:43:39,233 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-11-25 17:43:39,233 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [273633922] [2022-11-25 17:43:39,233 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-25 17:43:39,233 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-11-25 17:43:39,287 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-25 17:43:41,619 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 8 [2022-11-25 17:43:41,627 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-25 17:43:41,935 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 20 [2022-11-25 17:43:41,941 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-25 17:43:42,428 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 35 [2022-11-25 17:43:42,436 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-25 17:43:43,152 INFO L134 CoverageAnalysis]: Checked inductivity of 42 backedges. 3 proven. 36 refuted. 0 times theorem prover too weak. 3 trivial. 0 not checked. [2022-11-25 17:43:43,152 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-11-25 17:43:43,153 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [273633922] [2022-11-25 17:43:43,153 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [273633922] provided 0 perfect and 1 imperfect interpolant sequences [2022-11-25 17:43:43,153 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [2029344444] [2022-11-25 17:43:43,153 INFO L93 rtionOrderModulation]: Changing assertion order to TERMS_WITH_SMALL_CONSTANTS_FIRST [2022-11-25 17:43:43,153 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-11-25 17:43:43,153 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_a460571b-f395-45fb-9a27-7e8e20061ee7/bin/uautomizer-ZsLfNo2U6R/z3 [2022-11-25 17:43:43,154 INFO L229 MonitoredProcess]: Starting monitored process 9 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_a460571b-f395-45fb-9a27-7e8e20061ee7/bin/uautomizer-ZsLfNo2U6R/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-11-25 17:43:43,158 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_a460571b-f395-45fb-9a27-7e8e20061ee7/bin/uautomizer-ZsLfNo2U6R/z3 -smt2 -in SMTLIB2_COMPLIANT=true (9)] Waiting until timeout for monitored process [2022-11-25 17:43:43,247 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2022-11-25 17:43:43,247 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-11-25 17:43:43,251 INFO L263 TraceCheckSpWp]: Trace formula consists of 206 conjuncts, 92 conjunts are in the unsatisfiable core [2022-11-25 17:43:43,258 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-11-25 17:43:43,963 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-25 17:43:43,964 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 1 select indices, 1 select index equivalence classes, 1 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 63 treesize of output 43 [2022-11-25 17:43:45,132 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-25 17:43:45,133 INFO L173 IndexEqualityManager]: detected equality via solver [2022-11-25 17:43:45,134 INFO L173 IndexEqualityManager]: detected equality via solver [2022-11-25 17:43:45,138 INFO L321 Elim1Store]: treesize reduction 2, result has 33.3 percent of original size [2022-11-25 17:43:45,139 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 3 select indices, 3 select index equivalence classes, 1 disjoint index pairs (out of 3 index pairs), introduced 3 new quantified variables, introduced 3 case distinctions, treesize of input 132 treesize of output 95 [2022-11-25 17:43:45,514 INFO L173 IndexEqualityManager]: detected equality via solver [2022-11-25 17:43:45,516 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-25 17:43:45,516 INFO L173 IndexEqualityManager]: detected equality via solver [2022-11-25 17:43:45,523 INFO L321 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2022-11-25 17:43:45,524 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 3 select indices, 3 select index equivalence classes, 1 disjoint index pairs (out of 3 index pairs), introduced 3 new quantified variables, introduced 3 case distinctions, treesize of input 137 treesize of output 103 [2022-11-25 17:43:46,475 INFO L321 Elim1Store]: treesize reduction 52, result has 67.7 percent of original size [2022-11-25 17:43:46,475 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 0 stores, 6 select indices, 6 select index equivalence classes, 1 disjoint index pairs (out of 15 index pairs), introduced 6 new quantified variables, introduced 15 case distinctions, treesize of input 177 treesize of output 205 [2022-11-25 17:43:47,377 INFO L134 CoverageAnalysis]: Checked inductivity of 42 backedges. 5 proven. 37 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-11-25 17:43:47,378 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-11-25 17:43:50,288 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [2029344444] provided 0 perfect and 1 imperfect interpolant sequences [2022-11-25 17:43:50,288 INFO L184 FreeRefinementEngine]: Found 0 perfect and 2 imperfect interpolant sequences. [2022-11-25 17:43:50,288 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [30, 29] total 56 [2022-11-25 17:43:50,289 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1504761959] [2022-11-25 17:43:50,289 INFO L85 oduleStraightlineAll]: Using 2 imperfect interpolants to construct interpolant automaton [2022-11-25 17:43:50,289 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 56 states [2022-11-25 17:43:50,289 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-11-25 17:43:50,290 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 56 interpolants. [2022-11-25 17:43:50,291 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=258, Invalid=3774, Unknown=0, NotChecked=0, Total=4032 [2022-11-25 17:43:50,291 INFO L87 Difference]: Start difference. First operand 619 states and 881 transitions. Second operand has 56 states, 51 states have (on average 1.6274509803921569) internal successors, (83), 48 states have internal predecessors, (83), 6 states have call successors, (6), 3 states have call predecessors, (6), 6 states have return successors, (6), 6 states have call predecessors, (6), 6 states have call successors, (6) [2022-11-25 17:44:01,831 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-11-25 17:44:01,832 INFO L93 Difference]: Finished difference Result 1277 states and 1792 transitions. [2022-11-25 17:44:01,832 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 77 states. [2022-11-25 17:44:01,833 INFO L78 Accepts]: Start accepts. Automaton has has 56 states, 51 states have (on average 1.6274509803921569) internal successors, (83), 48 states have internal predecessors, (83), 6 states have call successors, (6), 3 states have call predecessors, (6), 6 states have return successors, (6), 6 states have call predecessors, (6), 6 states have call successors, (6) Word has length 49 [2022-11-25 17:44:01,833 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-11-25 17:44:01,839 INFO L225 Difference]: With dead ends: 1277 [2022-11-25 17:44:01,839 INFO L226 Difference]: Without dead ends: 1148 [2022-11-25 17:44:01,842 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 164 GetRequests, 39 SyntacticMatches, 3 SemanticMatches, 122 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 4198 ImplicationChecksByTransitivity, 13.5s TimeCoverageRelationStatistics Valid=1089, Invalid=14163, Unknown=0, NotChecked=0, Total=15252 [2022-11-25 17:44:01,843 INFO L413 NwaCegarLoop]: 23 mSDtfsCounter, 334 mSDsluCounter, 527 mSDsCounter, 0 mSdLazyCounter, 3256 mSolverCounterSat, 123 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 3.4s Time, 0 mProtectedPredicate, 0 mProtectedAction, 342 SdHoareTripleChecker+Valid, 550 SdHoareTripleChecker+Invalid, 3379 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 123 IncrementalHoareTripleChecker+Valid, 3256 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 3.8s IncrementalHoareTripleChecker+Time [2022-11-25 17:44:01,843 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [342 Valid, 550 Invalid, 3379 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [123 Valid, 3256 Invalid, 0 Unknown, 0 Unchecked, 3.8s Time] [2022-11-25 17:44:01,845 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1148 states. [2022-11-25 17:44:01,991 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1148 to 744. [2022-11-25 17:44:01,993 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 744 states, 680 states have (on average 1.4161764705882354) internal successors, (963), 704 states have internal predecessors, (963), 29 states have call successors, (29), 16 states have call predecessors, (29), 34 states have return successors, (86), 23 states have call predecessors, (86), 29 states have call successors, (86) [2022-11-25 17:44:01,998 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 744 states to 744 states and 1078 transitions. [2022-11-25 17:44:01,998 INFO L78 Accepts]: Start accepts. Automaton has 744 states and 1078 transitions. Word has length 49 [2022-11-25 17:44:01,999 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-11-25 17:44:01,999 INFO L495 AbstractCegarLoop]: Abstraction has 744 states and 1078 transitions. [2022-11-25 17:44:01,999 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 56 states, 51 states have (on average 1.6274509803921569) internal successors, (83), 48 states have internal predecessors, (83), 6 states have call successors, (6), 3 states have call predecessors, (6), 6 states have return successors, (6), 6 states have call predecessors, (6), 6 states have call successors, (6) [2022-11-25 17:44:02,000 INFO L276 IsEmpty]: Start isEmpty. Operand 744 states and 1078 transitions. [2022-11-25 17:44:02,004 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 50 [2022-11-25 17:44:02,004 INFO L187 NwaCegarLoop]: Found error trace [2022-11-25 17:44:02,004 INFO L195 NwaCegarLoop]: trace histogram [3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-11-25 17:44:02,014 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_a460571b-f395-45fb-9a27-7e8e20061ee7/bin/uautomizer-ZsLfNo2U6R/z3 -smt2 -in SMTLIB2_COMPLIANT=true (9)] Forceful destruction successful, exit code 0 [2022-11-25 17:44:02,210 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable9,9 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_a460571b-f395-45fb-9a27-7e8e20061ee7/bin/uautomizer-ZsLfNo2U6R/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-11-25 17:44:02,210 INFO L420 AbstractCegarLoop]: === Iteration 11 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-11-25 17:44:02,211 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-11-25 17:44:02,211 INFO L85 PathProgramCache]: Analyzing trace with hash -1026804935, now seen corresponding path program 2 times [2022-11-25 17:44:02,211 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-11-25 17:44:02,211 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1643238390] [2022-11-25 17:44:02,211 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-25 17:44:02,211 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-11-25 17:44:02,233 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-25 17:44:02,300 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 10 [2022-11-25 17:44:02,304 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-25 17:44:02,334 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 21 [2022-11-25 17:44:02,336 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-25 17:44:02,338 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 36 [2022-11-25 17:44:02,344 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-25 17:44:02,347 INFO L134 CoverageAnalysis]: Checked inductivity of 46 backedges. 1 proven. 29 refuted. 0 times theorem prover too weak. 16 trivial. 0 not checked. [2022-11-25 17:44:02,347 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-11-25 17:44:02,348 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1643238390] [2022-11-25 17:44:02,348 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1643238390] provided 0 perfect and 1 imperfect interpolant sequences [2022-11-25 17:44:02,348 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1573516087] [2022-11-25 17:44:02,348 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 [2022-11-25 17:44:02,348 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-11-25 17:44:02,349 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_a460571b-f395-45fb-9a27-7e8e20061ee7/bin/uautomizer-ZsLfNo2U6R/z3 [2022-11-25 17:44:02,350 INFO L229 MonitoredProcess]: Starting monitored process 10 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_a460571b-f395-45fb-9a27-7e8e20061ee7/bin/uautomizer-ZsLfNo2U6R/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-11-25 17:44:02,380 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_a460571b-f395-45fb-9a27-7e8e20061ee7/bin/uautomizer-ZsLfNo2U6R/z3 -smt2 -in SMTLIB2_COMPLIANT=true (10)] Waiting until timeout for monitored process [2022-11-25 17:44:02,459 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2022-11-25 17:44:02,459 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-11-25 17:44:02,460 INFO L263 TraceCheckSpWp]: Trace formula consists of 213 conjuncts, 7 conjunts are in the unsatisfiable core [2022-11-25 17:44:02,462 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-11-25 17:44:02,537 INFO L134 CoverageAnalysis]: Checked inductivity of 46 backedges. 20 proven. 6 refuted. 0 times theorem prover too weak. 20 trivial. 0 not checked. [2022-11-25 17:44:02,537 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-11-25 17:44:02,667 INFO L134 CoverageAnalysis]: Checked inductivity of 46 backedges. 4 proven. 26 refuted. 0 times theorem prover too weak. 16 trivial. 0 not checked. [2022-11-25 17:44:02,668 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1573516087] provided 0 perfect and 2 imperfect interpolant sequences [2022-11-25 17:44:02,668 INFO L184 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-11-25 17:44:02,668 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [9, 8, 9] total 14 [2022-11-25 17:44:02,668 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1964395466] [2022-11-25 17:44:02,668 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-11-25 17:44:02,669 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 14 states [2022-11-25 17:44:02,669 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-11-25 17:44:02,669 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 14 interpolants. [2022-11-25 17:44:02,669 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=45, Invalid=137, Unknown=0, NotChecked=0, Total=182 [2022-11-25 17:44:02,670 INFO L87 Difference]: Start difference. First operand 744 states and 1078 transitions. Second operand has 14 states, 14 states have (on average 4.142857142857143) internal successors, (58), 14 states have internal predecessors, (58), 2 states have call successors, (6), 3 states have call predecessors, (6), 3 states have return successors, (6), 1 states have call predecessors, (6), 2 states have call successors, (6) [2022-11-25 17:44:03,096 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-11-25 17:44:03,096 INFO L93 Difference]: Finished difference Result 1818 states and 2633 transitions. [2022-11-25 17:44:03,097 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 17 states. [2022-11-25 17:44:03,097 INFO L78 Accepts]: Start accepts. Automaton has has 14 states, 14 states have (on average 4.142857142857143) internal successors, (58), 14 states have internal predecessors, (58), 2 states have call successors, (6), 3 states have call predecessors, (6), 3 states have return successors, (6), 1 states have call predecessors, (6), 2 states have call successors, (6) Word has length 49 [2022-11-25 17:44:03,097 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-11-25 17:44:03,107 INFO L225 Difference]: With dead ends: 1818 [2022-11-25 17:44:03,107 INFO L226 Difference]: Without dead ends: 1611 [2022-11-25 17:44:03,109 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 117 GetRequests, 95 SyntacticMatches, 5 SemanticMatches, 17 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 72 ImplicationChecksByTransitivity, 0.2s TimeCoverageRelationStatistics Valid=79, Invalid=263, Unknown=0, NotChecked=0, Total=342 [2022-11-25 17:44:03,110 INFO L413 NwaCegarLoop]: 53 mSDtfsCounter, 133 mSDsluCounter, 255 mSDsCounter, 0 mSdLazyCounter, 231 mSolverCounterSat, 27 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 138 SdHoareTripleChecker+Valid, 308 SdHoareTripleChecker+Invalid, 258 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 27 IncrementalHoareTripleChecker+Valid, 231 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.2s IncrementalHoareTripleChecker+Time [2022-11-25 17:44:03,110 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [138 Valid, 308 Invalid, 258 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [27 Valid, 231 Invalid, 0 Unknown, 0 Unchecked, 0.2s Time] [2022-11-25 17:44:03,112 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1611 states. [2022-11-25 17:44:03,320 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1611 to 1091. [2022-11-25 17:44:03,323 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 1091 states, 1000 states have (on average 1.407) internal successors, (1407), 1037 states have internal predecessors, (1407), 39 states have call successors, (39), 21 states have call predecessors, (39), 51 states have return successors, (150), 32 states have call predecessors, (150), 39 states have call successors, (150) [2022-11-25 17:44:03,329 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1091 states to 1091 states and 1596 transitions. [2022-11-25 17:44:03,331 INFO L78 Accepts]: Start accepts. Automaton has 1091 states and 1596 transitions. Word has length 49 [2022-11-25 17:44:03,333 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-11-25 17:44:03,333 INFO L495 AbstractCegarLoop]: Abstraction has 1091 states and 1596 transitions. [2022-11-25 17:44:03,333 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 14 states, 14 states have (on average 4.142857142857143) internal successors, (58), 14 states have internal predecessors, (58), 2 states have call successors, (6), 3 states have call predecessors, (6), 3 states have return successors, (6), 1 states have call predecessors, (6), 2 states have call successors, (6) [2022-11-25 17:44:03,333 INFO L276 IsEmpty]: Start isEmpty. Operand 1091 states and 1596 transitions. [2022-11-25 17:44:03,337 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 51 [2022-11-25 17:44:03,337 INFO L187 NwaCegarLoop]: Found error trace [2022-11-25 17:44:03,338 INFO L195 NwaCegarLoop]: trace histogram [3, 3, 3, 3, 3, 3, 3, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-11-25 17:44:03,354 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_a460571b-f395-45fb-9a27-7e8e20061ee7/bin/uautomizer-ZsLfNo2U6R/z3 -smt2 -in SMTLIB2_COMPLIANT=true (10)] Forceful destruction successful, exit code 0 [2022-11-25 17:44:03,548 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 10 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_a460571b-f395-45fb-9a27-7e8e20061ee7/bin/uautomizer-ZsLfNo2U6R/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable10 [2022-11-25 17:44:03,548 INFO L420 AbstractCegarLoop]: === Iteration 12 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-11-25 17:44:03,549 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-11-25 17:44:03,549 INFO L85 PathProgramCache]: Analyzing trace with hash -883797861, now seen corresponding path program 1 times [2022-11-25 17:44:03,549 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-11-25 17:44:03,549 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [191248200] [2022-11-25 17:44:03,549 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-25 17:44:03,549 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-11-25 17:44:03,566 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-25 17:44:04,489 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 8 [2022-11-25 17:44:04,491 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-25 17:44:04,561 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 20 [2022-11-25 17:44:04,564 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-25 17:44:04,605 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 35 [2022-11-25 17:44:04,608 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-25 17:44:04,874 INFO L134 CoverageAnalysis]: Checked inductivity of 42 backedges. 3 proven. 32 refuted. 0 times theorem prover too weak. 7 trivial. 0 not checked. [2022-11-25 17:44:04,875 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-11-25 17:44:04,875 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [191248200] [2022-11-25 17:44:04,875 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [191248200] provided 0 perfect and 1 imperfect interpolant sequences [2022-11-25 17:44:04,875 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1194199350] [2022-11-25 17:44:04,875 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-25 17:44:04,875 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-11-25 17:44:04,875 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_a460571b-f395-45fb-9a27-7e8e20061ee7/bin/uautomizer-ZsLfNo2U6R/z3 [2022-11-25 17:44:04,877 INFO L229 MonitoredProcess]: Starting monitored process 11 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_a460571b-f395-45fb-9a27-7e8e20061ee7/bin/uautomizer-ZsLfNo2U6R/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-11-25 17:44:04,898 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_a460571b-f395-45fb-9a27-7e8e20061ee7/bin/uautomizer-ZsLfNo2U6R/z3 -smt2 -in SMTLIB2_COMPLIANT=true (11)] Waiting until timeout for monitored process [2022-11-25 17:44:04,979 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-25 17:44:04,981 INFO L263 TraceCheckSpWp]: Trace formula consists of 207 conjuncts, 42 conjunts are in the unsatisfiable core [2022-11-25 17:44:04,983 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-11-25 17:44:05,294 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 15 treesize of output 7 [2022-11-25 17:44:05,369 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 16 treesize of output 12 [2022-11-25 17:44:05,834 INFO L134 CoverageAnalysis]: Checked inductivity of 42 backedges. 10 proven. 29 refuted. 0 times theorem prover too weak. 3 trivial. 0 not checked. [2022-11-25 17:44:05,834 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-11-25 17:44:06,169 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 46 treesize of output 40 [2022-11-25 17:44:06,178 INFO L321 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2022-11-25 17:44:06,179 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 1 case distinctions, treesize of input 87 treesize of output 73 [2022-11-25 17:44:06,372 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 8 treesize of output 4 [2022-11-25 17:44:06,708 INFO L134 CoverageAnalysis]: Checked inductivity of 42 backedges. 23 proven. 14 refuted. 0 times theorem prover too weak. 5 trivial. 0 not checked. [2022-11-25 17:44:06,709 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1194199350] provided 0 perfect and 2 imperfect interpolant sequences [2022-11-25 17:44:06,709 INFO L184 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-11-25 17:44:06,709 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [22, 17, 15] total 49 [2022-11-25 17:44:06,709 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2012204430] [2022-11-25 17:44:06,709 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-11-25 17:44:06,710 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 49 states [2022-11-25 17:44:06,710 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-11-25 17:44:06,711 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 49 interpolants. [2022-11-25 17:44:06,711 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=277, Invalid=2075, Unknown=0, NotChecked=0, Total=2352 [2022-11-25 17:44:06,712 INFO L87 Difference]: Start difference. First operand 1091 states and 1596 transitions. Second operand has 49 states, 45 states have (on average 2.6444444444444444) internal successors, (119), 44 states have internal predecessors, (119), 6 states have call successors, (9), 3 states have call predecessors, (9), 9 states have return successors, (9), 7 states have call predecessors, (9), 6 states have call successors, (9) [2022-11-25 17:44:13,141 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-11-25 17:44:13,141 INFO L93 Difference]: Finished difference Result 2215 states and 3180 transitions. [2022-11-25 17:44:13,142 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 85 states. [2022-11-25 17:44:13,142 INFO L78 Accepts]: Start accepts. Automaton has has 49 states, 45 states have (on average 2.6444444444444444) internal successors, (119), 44 states have internal predecessors, (119), 6 states have call successors, (9), 3 states have call predecessors, (9), 9 states have return successors, (9), 7 states have call predecessors, (9), 6 states have call successors, (9) Word has length 50 [2022-11-25 17:44:13,142 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-11-25 17:44:13,150 INFO L225 Difference]: With dead ends: 2215 [2022-11-25 17:44:13,150 INFO L226 Difference]: Without dead ends: 1701 [2022-11-25 17:44:13,155 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 219 GetRequests, 98 SyntacticMatches, 1 SemanticMatches, 120 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 4688 ImplicationChecksByTransitivity, 5.7s TimeCoverageRelationStatistics Valid=1736, Invalid=13026, Unknown=0, NotChecked=0, Total=14762 [2022-11-25 17:44:13,155 INFO L413 NwaCegarLoop]: 62 mSDtfsCounter, 426 mSDsluCounter, 904 mSDsCounter, 0 mSdLazyCounter, 2326 mSolverCounterSat, 138 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 1.6s Time, 0 mProtectedPredicate, 0 mProtectedAction, 428 SdHoareTripleChecker+Valid, 966 SdHoareTripleChecker+Invalid, 2464 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 138 IncrementalHoareTripleChecker+Valid, 2326 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 1.8s IncrementalHoareTripleChecker+Time [2022-11-25 17:44:13,156 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [428 Valid, 966 Invalid, 2464 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [138 Valid, 2326 Invalid, 0 Unknown, 0 Unchecked, 1.8s Time] [2022-11-25 17:44:13,158 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1701 states. [2022-11-25 17:44:13,332 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1701 to 996. [2022-11-25 17:44:13,334 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 996 states, 914 states have (on average 1.4059080962800876) internal successors, (1285), 942 states have internal predecessors, (1285), 33 states have call successors, (33), 23 states have call predecessors, (33), 48 states have return successors, (102), 30 states have call predecessors, (102), 33 states have call successors, (102) [2022-11-25 17:44:13,338 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 996 states to 996 states and 1420 transitions. [2022-11-25 17:44:13,338 INFO L78 Accepts]: Start accepts. Automaton has 996 states and 1420 transitions. Word has length 50 [2022-11-25 17:44:13,339 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-11-25 17:44:13,339 INFO L495 AbstractCegarLoop]: Abstraction has 996 states and 1420 transitions. [2022-11-25 17:44:13,339 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 49 states, 45 states have (on average 2.6444444444444444) internal successors, (119), 44 states have internal predecessors, (119), 6 states have call successors, (9), 3 states have call predecessors, (9), 9 states have return successors, (9), 7 states have call predecessors, (9), 6 states have call successors, (9) [2022-11-25 17:44:13,339 INFO L276 IsEmpty]: Start isEmpty. Operand 996 states and 1420 transitions. [2022-11-25 17:44:13,342 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 51 [2022-11-25 17:44:13,342 INFO L187 NwaCegarLoop]: Found error trace [2022-11-25 17:44:13,343 INFO L195 NwaCegarLoop]: trace histogram [3, 3, 3, 3, 3, 3, 3, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-11-25 17:44:13,350 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_a460571b-f395-45fb-9a27-7e8e20061ee7/bin/uautomizer-ZsLfNo2U6R/z3 -smt2 -in SMTLIB2_COMPLIANT=true (11)] Forceful destruction successful, exit code 0 [2022-11-25 17:44:13,548 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable11,11 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_a460571b-f395-45fb-9a27-7e8e20061ee7/bin/uautomizer-ZsLfNo2U6R/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-11-25 17:44:13,548 INFO L420 AbstractCegarLoop]: === Iteration 13 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-11-25 17:44:13,548 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-11-25 17:44:13,548 INFO L85 PathProgramCache]: Analyzing trace with hash -1276824871, now seen corresponding path program 1 times [2022-11-25 17:44:13,548 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-11-25 17:44:13,548 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1575932800] [2022-11-25 17:44:13,549 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-25 17:44:13,549 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-11-25 17:44:13,565 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-25 17:44:14,071 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 8 [2022-11-25 17:44:14,073 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-25 17:44:14,077 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 20 [2022-11-25 17:44:14,079 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-25 17:44:14,137 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 35 [2022-11-25 17:44:14,140 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-25 17:44:14,567 INFO L134 CoverageAnalysis]: Checked inductivity of 42 backedges. 21 proven. 13 refuted. 0 times theorem prover too weak. 8 trivial. 0 not checked. [2022-11-25 17:44:14,567 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-11-25 17:44:14,567 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1575932800] [2022-11-25 17:44:14,568 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1575932800] provided 0 perfect and 1 imperfect interpolant sequences [2022-11-25 17:44:14,568 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [963489332] [2022-11-25 17:44:14,568 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-25 17:44:14,568 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-11-25 17:44:14,568 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_a460571b-f395-45fb-9a27-7e8e20061ee7/bin/uautomizer-ZsLfNo2U6R/z3 [2022-11-25 17:44:14,571 INFO L229 MonitoredProcess]: Starting monitored process 12 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_a460571b-f395-45fb-9a27-7e8e20061ee7/bin/uautomizer-ZsLfNo2U6R/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-11-25 17:44:14,590 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_a460571b-f395-45fb-9a27-7e8e20061ee7/bin/uautomizer-ZsLfNo2U6R/z3 -smt2 -in SMTLIB2_COMPLIANT=true (12)] Waiting until timeout for monitored process [2022-11-25 17:44:14,670 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-25 17:44:14,672 INFO L263 TraceCheckSpWp]: Trace formula consists of 207 conjuncts, 38 conjunts are in the unsatisfiable core [2022-11-25 17:44:14,675 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-11-25 17:44:15,039 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 15 treesize of output 7 [2022-11-25 17:44:15,101 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 16 treesize of output 12 [2022-11-25 17:44:15,496 INFO L134 CoverageAnalysis]: Checked inductivity of 42 backedges. 10 proven. 29 refuted. 0 times theorem prover too weak. 3 trivial. 0 not checked. [2022-11-25 17:44:15,497 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-11-25 17:44:15,701 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 17 treesize of output 15 [2022-11-25 17:44:15,705 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 24 treesize of output 20 [2022-11-25 17:44:15,831 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 8 treesize of output 4 [2022-11-25 17:44:16,162 INFO L134 CoverageAnalysis]: Checked inductivity of 42 backedges. 23 proven. 14 refuted. 0 times theorem prover too weak. 5 trivial. 0 not checked. [2022-11-25 17:44:16,162 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [963489332] provided 0 perfect and 2 imperfect interpolant sequences [2022-11-25 17:44:16,163 INFO L184 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-11-25 17:44:16,163 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [18, 16, 14] total 43 [2022-11-25 17:44:16,163 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [984386072] [2022-11-25 17:44:16,163 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-11-25 17:44:16,163 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 43 states [2022-11-25 17:44:16,164 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-11-25 17:44:16,164 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 43 interpolants. [2022-11-25 17:44:16,165 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=176, Invalid=1630, Unknown=0, NotChecked=0, Total=1806 [2022-11-25 17:44:16,165 INFO L87 Difference]: Start difference. First operand 996 states and 1420 transitions. Second operand has 43 states, 40 states have (on average 2.775) internal successors, (111), 39 states have internal predecessors, (111), 6 states have call successors, (9), 3 states have call predecessors, (9), 8 states have return successors, (9), 7 states have call predecessors, (9), 6 states have call successors, (9) [2022-11-25 17:44:23,154 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-11-25 17:44:23,154 INFO L93 Difference]: Finished difference Result 1318 states and 1826 transitions. [2022-11-25 17:44:23,155 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 98 states. [2022-11-25 17:44:23,155 INFO L78 Accepts]: Start accepts. Automaton has has 43 states, 40 states have (on average 2.775) internal successors, (111), 39 states have internal predecessors, (111), 6 states have call successors, (9), 3 states have call predecessors, (9), 8 states have return successors, (9), 7 states have call predecessors, (9), 6 states have call successors, (9) Word has length 50 [2022-11-25 17:44:23,155 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-11-25 17:44:23,160 INFO L225 Difference]: With dead ends: 1318 [2022-11-25 17:44:23,161 INFO L226 Difference]: Without dead ends: 1283 [2022-11-25 17:44:23,163 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 219 GetRequests, 95 SyntacticMatches, 1 SemanticMatches, 123 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 5103 ImplicationChecksByTransitivity, 6.2s TimeCoverageRelationStatistics Valid=1695, Invalid=13805, Unknown=0, NotChecked=0, Total=15500 [2022-11-25 17:44:23,164 INFO L413 NwaCegarLoop]: 53 mSDtfsCounter, 477 mSDsluCounter, 825 mSDsCounter, 0 mSdLazyCounter, 1890 mSolverCounterSat, 121 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 1.5s Time, 0 mProtectedPredicate, 0 mProtectedAction, 480 SdHoareTripleChecker+Valid, 878 SdHoareTripleChecker+Invalid, 2011 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 121 IncrementalHoareTripleChecker+Valid, 1890 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 1.7s IncrementalHoareTripleChecker+Time [2022-11-25 17:44:23,164 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [480 Valid, 878 Invalid, 2011 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [121 Valid, 1890 Invalid, 0 Unknown, 0 Unchecked, 1.7s Time] [2022-11-25 17:44:23,166 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1283 states. [2022-11-25 17:44:23,329 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1283 to 983. [2022-11-25 17:44:23,331 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 983 states, 901 states have (on average 1.4028856825749167) internal successors, (1264), 929 states have internal predecessors, (1264), 33 states have call successors, (33), 23 states have call predecessors, (33), 48 states have return successors, (102), 30 states have call predecessors, (102), 33 states have call successors, (102) [2022-11-25 17:44:23,335 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 983 states to 983 states and 1399 transitions. [2022-11-25 17:44:23,336 INFO L78 Accepts]: Start accepts. Automaton has 983 states and 1399 transitions. Word has length 50 [2022-11-25 17:44:23,336 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-11-25 17:44:23,336 INFO L495 AbstractCegarLoop]: Abstraction has 983 states and 1399 transitions. [2022-11-25 17:44:23,336 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 43 states, 40 states have (on average 2.775) internal successors, (111), 39 states have internal predecessors, (111), 6 states have call successors, (9), 3 states have call predecessors, (9), 8 states have return successors, (9), 7 states have call predecessors, (9), 6 states have call successors, (9) [2022-11-25 17:44:23,336 INFO L276 IsEmpty]: Start isEmpty. Operand 983 states and 1399 transitions. [2022-11-25 17:44:23,339 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 51 [2022-11-25 17:44:23,339 INFO L187 NwaCegarLoop]: Found error trace [2022-11-25 17:44:23,340 INFO L195 NwaCegarLoop]: trace histogram [3, 3, 3, 3, 3, 3, 3, 3, 3, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-11-25 17:44:23,350 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_a460571b-f395-45fb-9a27-7e8e20061ee7/bin/uautomizer-ZsLfNo2U6R/z3 -smt2 -in SMTLIB2_COMPLIANT=true (12)] Forceful destruction successful, exit code 0 [2022-11-25 17:44:23,545 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 12 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_a460571b-f395-45fb-9a27-7e8e20061ee7/bin/uautomizer-ZsLfNo2U6R/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable12 [2022-11-25 17:44:23,546 INFO L420 AbstractCegarLoop]: === Iteration 14 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-11-25 17:44:23,546 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-11-25 17:44:23,546 INFO L85 PathProgramCache]: Analyzing trace with hash 1009212980, now seen corresponding path program 1 times [2022-11-25 17:44:23,546 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-11-25 17:44:23,546 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1185930144] [2022-11-25 17:44:23,547 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-25 17:44:23,547 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-11-25 17:44:23,562 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-25 17:44:23,732 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 8 [2022-11-25 17:44:23,735 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-25 17:44:23,828 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 20 [2022-11-25 17:44:23,830 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-25 17:44:23,883 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 36 [2022-11-25 17:44:23,885 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-25 17:44:23,887 INFO L134 CoverageAnalysis]: Checked inductivity of 44 backedges. 0 proven. 35 refuted. 0 times theorem prover too weak. 9 trivial. 0 not checked. [2022-11-25 17:44:23,887 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-11-25 17:44:23,888 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1185930144] [2022-11-25 17:44:23,888 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1185930144] provided 0 perfect and 1 imperfect interpolant sequences [2022-11-25 17:44:23,888 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1733717776] [2022-11-25 17:44:23,888 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-25 17:44:23,888 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-11-25 17:44:23,889 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_a460571b-f395-45fb-9a27-7e8e20061ee7/bin/uautomizer-ZsLfNo2U6R/z3 [2022-11-25 17:44:23,890 INFO L229 MonitoredProcess]: Starting monitored process 13 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_a460571b-f395-45fb-9a27-7e8e20061ee7/bin/uautomizer-ZsLfNo2U6R/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-11-25 17:44:23,914 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_a460571b-f395-45fb-9a27-7e8e20061ee7/bin/uautomizer-ZsLfNo2U6R/z3 -smt2 -in SMTLIB2_COMPLIANT=true (13)] Waiting until timeout for monitored process [2022-11-25 17:44:24,001 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-25 17:44:24,003 INFO L263 TraceCheckSpWp]: Trace formula consists of 207 conjuncts, 37 conjunts are in the unsatisfiable core [2022-11-25 17:44:24,005 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-11-25 17:44:24,046 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 13 treesize of output 9 [2022-11-25 17:44:24,135 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-25 17:44:24,136 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 1 select indices, 1 select index equivalence classes, 1 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 32 treesize of output 20 [2022-11-25 17:44:24,243 INFO L134 CoverageAnalysis]: Checked inductivity of 44 backedges. 25 proven. 17 refuted. 0 times theorem prover too weak. 2 trivial. 0 not checked. [2022-11-25 17:44:24,243 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-11-25 17:44:24,450 INFO L134 CoverageAnalysis]: Checked inductivity of 44 backedges. 2 proven. 33 refuted. 0 times theorem prover too weak. 9 trivial. 0 not checked. [2022-11-25 17:44:24,451 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1733717776] provided 0 perfect and 2 imperfect interpolant sequences [2022-11-25 17:44:24,451 INFO L184 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-11-25 17:44:24,451 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [11, 13, 9] total 24 [2022-11-25 17:44:24,451 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [649565561] [2022-11-25 17:44:24,451 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-11-25 17:44:24,452 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 24 states [2022-11-25 17:44:24,452 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-11-25 17:44:24,452 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 24 interpolants. [2022-11-25 17:44:24,452 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=69, Invalid=483, Unknown=0, NotChecked=0, Total=552 [2022-11-25 17:44:24,453 INFO L87 Difference]: Start difference. First operand 983 states and 1399 transitions. Second operand has 24 states, 22 states have (on average 3.8636363636363638) internal successors, (85), 21 states have internal predecessors, (85), 5 states have call successors, (7), 3 states have call predecessors, (7), 6 states have return successors, (8), 3 states have call predecessors, (8), 5 states have call successors, (8) [2022-11-25 17:44:25,436 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-11-25 17:44:25,436 INFO L93 Difference]: Finished difference Result 1652 states and 2298 transitions. [2022-11-25 17:44:25,436 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 34 states. [2022-11-25 17:44:25,437 INFO L78 Accepts]: Start accepts. Automaton has has 24 states, 22 states have (on average 3.8636363636363638) internal successors, (85), 21 states have internal predecessors, (85), 5 states have call successors, (7), 3 states have call predecessors, (7), 6 states have return successors, (8), 3 states have call predecessors, (8), 5 states have call successors, (8) Word has length 50 [2022-11-25 17:44:25,437 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-11-25 17:44:25,442 INFO L225 Difference]: With dead ends: 1652 [2022-11-25 17:44:25,443 INFO L226 Difference]: Without dead ends: 1302 [2022-11-25 17:44:25,445 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 141 GetRequests, 98 SyntacticMatches, 0 SemanticMatches, 43 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 466 ImplicationChecksByTransitivity, 0.7s TimeCoverageRelationStatistics Valid=363, Invalid=1617, Unknown=0, NotChecked=0, Total=1980 [2022-11-25 17:44:25,445 INFO L413 NwaCegarLoop]: 50 mSDtfsCounter, 120 mSDsluCounter, 543 mSDsCounter, 0 mSdLazyCounter, 701 mSolverCounterSat, 6 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.4s Time, 0 mProtectedPredicate, 0 mProtectedAction, 124 SdHoareTripleChecker+Valid, 593 SdHoareTripleChecker+Invalid, 707 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 6 IncrementalHoareTripleChecker+Valid, 701 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.4s IncrementalHoareTripleChecker+Time [2022-11-25 17:44:25,446 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [124 Valid, 593 Invalid, 707 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [6 Valid, 701 Invalid, 0 Unknown, 0 Unchecked, 0.4s Time] [2022-11-25 17:44:25,447 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1302 states. [2022-11-25 17:44:25,641 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1302 to 1089. [2022-11-25 17:44:25,643 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 1089 states, 999 states have (on average 1.4044044044044044) internal successors, (1403), 1030 states have internal predecessors, (1403), 35 states have call successors, (35), 26 states have call predecessors, (35), 54 states have return successors, (104), 32 states have call predecessors, (104), 35 states have call successors, (104) [2022-11-25 17:44:25,647 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1089 states to 1089 states and 1542 transitions. [2022-11-25 17:44:25,648 INFO L78 Accepts]: Start accepts. Automaton has 1089 states and 1542 transitions. Word has length 50 [2022-11-25 17:44:25,648 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-11-25 17:44:25,648 INFO L495 AbstractCegarLoop]: Abstraction has 1089 states and 1542 transitions. [2022-11-25 17:44:25,649 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 24 states, 22 states have (on average 3.8636363636363638) internal successors, (85), 21 states have internal predecessors, (85), 5 states have call successors, (7), 3 states have call predecessors, (7), 6 states have return successors, (8), 3 states have call predecessors, (8), 5 states have call successors, (8) [2022-11-25 17:44:25,649 INFO L276 IsEmpty]: Start isEmpty. Operand 1089 states and 1542 transitions. [2022-11-25 17:44:25,652 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 51 [2022-11-25 17:44:25,652 INFO L187 NwaCegarLoop]: Found error trace [2022-11-25 17:44:25,652 INFO L195 NwaCegarLoop]: trace histogram [3, 3, 3, 3, 3, 3, 3, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-11-25 17:44:25,658 INFO L552 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_a460571b-f395-45fb-9a27-7e8e20061ee7/bin/uautomizer-ZsLfNo2U6R/z3 -smt2 -in SMTLIB2_COMPLIANT=true (13)] Ended with exit code 0 [2022-11-25 17:44:25,858 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 13 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_a460571b-f395-45fb-9a27-7e8e20061ee7/bin/uautomizer-ZsLfNo2U6R/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable13 [2022-11-25 17:44:25,858 INFO L420 AbstractCegarLoop]: === Iteration 15 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-11-25 17:44:25,858 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-11-25 17:44:25,858 INFO L85 PathProgramCache]: Analyzing trace with hash 1133179671, now seen corresponding path program 2 times [2022-11-25 17:44:25,858 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-11-25 17:44:25,859 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [87324747] [2022-11-25 17:44:25,859 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-25 17:44:25,859 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-11-25 17:44:25,872 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-25 17:44:26,040 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 8 [2022-11-25 17:44:26,043 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-25 17:44:26,145 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 21 [2022-11-25 17:44:26,148 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-25 17:44:26,204 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 36 [2022-11-25 17:44:26,206 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-25 17:44:26,208 INFO L134 CoverageAnalysis]: Checked inductivity of 42 backedges. 0 proven. 33 refuted. 0 times theorem prover too weak. 9 trivial. 0 not checked. [2022-11-25 17:44:26,208 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-11-25 17:44:26,208 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [87324747] [2022-11-25 17:44:26,208 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [87324747] provided 0 perfect and 1 imperfect interpolant sequences [2022-11-25 17:44:26,209 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [2005006621] [2022-11-25 17:44:26,209 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 [2022-11-25 17:44:26,209 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-11-25 17:44:26,209 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_a460571b-f395-45fb-9a27-7e8e20061ee7/bin/uautomizer-ZsLfNo2U6R/z3 [2022-11-25 17:44:26,211 INFO L229 MonitoredProcess]: Starting monitored process 14 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_a460571b-f395-45fb-9a27-7e8e20061ee7/bin/uautomizer-ZsLfNo2U6R/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-11-25 17:44:26,225 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_a460571b-f395-45fb-9a27-7e8e20061ee7/bin/uautomizer-ZsLfNo2U6R/z3 -smt2 -in SMTLIB2_COMPLIANT=true (14)] Waiting until timeout for monitored process [2022-11-25 17:44:26,322 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2022-11-25 17:44:26,322 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-11-25 17:44:26,324 INFO L263 TraceCheckSpWp]: Trace formula consists of 207 conjuncts, 37 conjunts are in the unsatisfiable core [2022-11-25 17:44:26,326 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-11-25 17:44:26,371 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 13 treesize of output 9 [2022-11-25 17:44:26,450 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-25 17:44:26,451 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 1 select indices, 1 select index equivalence classes, 1 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 33 treesize of output 21 [2022-11-25 17:44:26,549 INFO L134 CoverageAnalysis]: Checked inductivity of 42 backedges. 24 proven. 16 refuted. 0 times theorem prover too weak. 2 trivial. 0 not checked. [2022-11-25 17:44:26,550 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-11-25 17:44:26,749 INFO L134 CoverageAnalysis]: Checked inductivity of 42 backedges. 2 proven. 31 refuted. 0 times theorem prover too weak. 9 trivial. 0 not checked. [2022-11-25 17:44:26,749 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [2005006621] provided 0 perfect and 2 imperfect interpolant sequences [2022-11-25 17:44:26,749 INFO L184 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-11-25 17:44:26,750 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [11, 13, 9] total 24 [2022-11-25 17:44:26,750 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1688857116] [2022-11-25 17:44:26,750 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-11-25 17:44:26,750 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 24 states [2022-11-25 17:44:26,751 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-11-25 17:44:26,751 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 24 interpolants. [2022-11-25 17:44:26,751 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=69, Invalid=483, Unknown=0, NotChecked=0, Total=552 [2022-11-25 17:44:26,752 INFO L87 Difference]: Start difference. First operand 1089 states and 1542 transitions. Second operand has 24 states, 22 states have (on average 3.8636363636363638) internal successors, (85), 21 states have internal predecessors, (85), 5 states have call successors, (7), 3 states have call predecessors, (7), 6 states have return successors, (8), 3 states have call predecessors, (8), 5 states have call successors, (8) [2022-11-25 17:44:28,786 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.00s for a HTC check with result UNKNOWN. Formula has sorts [Array, Bool, Int], hasArrays=true, hasNonlinArith=false, quantifiers [0] [2022-11-25 17:44:30,806 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.00s for a HTC check with result UNKNOWN. Formula has sorts [Array, Bool, Int], hasArrays=true, hasNonlinArith=false, quantifiers [0] [2022-11-25 17:44:32,827 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.00s for a HTC check with result UNKNOWN. Formula has sorts [Array, Bool, Int], hasArrays=true, hasNonlinArith=false, quantifiers [0] [2022-11-25 17:44:35,115 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.00s for a HTC check with result UNKNOWN. Formula has sorts [Array, Bool, Int], hasArrays=true, hasNonlinArith=false, quantifiers [0] [2022-11-25 17:44:37,569 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.00s for a HTC check with result UNKNOWN. Formula has sorts [Array, Bool, Int], hasArrays=true, hasNonlinArith=false, quantifiers [0] [2022-11-25 17:44:39,719 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.00s for a HTC check with result UNKNOWN. Formula has sorts [Array, Bool, Int], hasArrays=true, hasNonlinArith=false, quantifiers [0] [2022-11-25 17:44:41,734 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.00s for a HTC check with result UNKNOWN. Formula has sorts [Array, Bool, Int], hasArrays=true, hasNonlinArith=false, quantifiers [0] [2022-11-25 17:44:43,800 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.00s for a HTC check with result UNKNOWN. Formula has sorts [Array, Bool, Int], hasArrays=true, hasNonlinArith=false, quantifiers [0] [2022-11-25 17:44:43,897 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-11-25 17:44:43,898 INFO L93 Difference]: Finished difference Result 1435 states and 1973 transitions. [2022-11-25 17:44:43,898 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 38 states. [2022-11-25 17:44:43,898 INFO L78 Accepts]: Start accepts. Automaton has has 24 states, 22 states have (on average 3.8636363636363638) internal successors, (85), 21 states have internal predecessors, (85), 5 states have call successors, (7), 3 states have call predecessors, (7), 6 states have return successors, (8), 3 states have call predecessors, (8), 5 states have call successors, (8) Word has length 50 [2022-11-25 17:44:43,899 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-11-25 17:44:43,903 INFO L225 Difference]: With dead ends: 1435 [2022-11-25 17:44:43,904 INFO L226 Difference]: Without dead ends: 1163 [2022-11-25 17:44:43,907 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 143 GetRequests, 96 SyntacticMatches, 0 SemanticMatches, 47 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 587 ImplicationChecksByTransitivity, 0.8s TimeCoverageRelationStatistics Valid=353, Invalid=1999, Unknown=0, NotChecked=0, Total=2352 [2022-11-25 17:44:43,908 INFO L413 NwaCegarLoop]: 53 mSDtfsCounter, 135 mSDsluCounter, 544 mSDsCounter, 0 mSdLazyCounter, 811 mSolverCounterSat, 13 mSolverCounterUnsat, 8 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 16.4s Time, 0 mProtectedPredicate, 0 mProtectedAction, 142 SdHoareTripleChecker+Valid, 597 SdHoareTripleChecker+Invalid, 832 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 13 IncrementalHoareTripleChecker+Valid, 811 IncrementalHoareTripleChecker+Invalid, 8 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 16.5s IncrementalHoareTripleChecker+Time [2022-11-25 17:44:43,908 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [142 Valid, 597 Invalid, 832 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [13 Valid, 811 Invalid, 8 Unknown, 0 Unchecked, 16.5s Time] [2022-11-25 17:44:43,910 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1163 states. [2022-11-25 17:44:44,089 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1163 to 948. [2022-11-25 17:44:44,091 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 948 states, 870 states have (on average 1.3988505747126436) internal successors, (1217), 896 states have internal predecessors, (1217), 31 states have call successors, (31), 23 states have call predecessors, (31), 46 states have return successors, (83), 28 states have call predecessors, (83), 31 states have call successors, (83) [2022-11-25 17:44:44,094 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 948 states to 948 states and 1331 transitions. [2022-11-25 17:44:44,094 INFO L78 Accepts]: Start accepts. Automaton has 948 states and 1331 transitions. Word has length 50 [2022-11-25 17:44:44,095 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-11-25 17:44:44,095 INFO L495 AbstractCegarLoop]: Abstraction has 948 states and 1331 transitions. [2022-11-25 17:44:44,095 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 24 states, 22 states have (on average 3.8636363636363638) internal successors, (85), 21 states have internal predecessors, (85), 5 states have call successors, (7), 3 states have call predecessors, (7), 6 states have return successors, (8), 3 states have call predecessors, (8), 5 states have call successors, (8) [2022-11-25 17:44:44,095 INFO L276 IsEmpty]: Start isEmpty. Operand 948 states and 1331 transitions. [2022-11-25 17:44:44,098 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 52 [2022-11-25 17:44:44,098 INFO L187 NwaCegarLoop]: Found error trace [2022-11-25 17:44:44,099 INFO L195 NwaCegarLoop]: trace histogram [4, 4, 4, 4, 3, 3, 3, 3, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-11-25 17:44:44,115 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_a460571b-f395-45fb-9a27-7e8e20061ee7/bin/uautomizer-ZsLfNo2U6R/z3 -smt2 -in SMTLIB2_COMPLIANT=true (14)] Forceful destruction successful, exit code 0 [2022-11-25 17:44:44,315 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 14 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_a460571b-f395-45fb-9a27-7e8e20061ee7/bin/uautomizer-ZsLfNo2U6R/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable14 [2022-11-25 17:44:44,315 INFO L420 AbstractCegarLoop]: === Iteration 16 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-11-25 17:44:44,316 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-11-25 17:44:44,316 INFO L85 PathProgramCache]: Analyzing trace with hash -152628014, now seen corresponding path program 3 times [2022-11-25 17:44:44,316 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-11-25 17:44:44,316 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [565922796] [2022-11-25 17:44:44,316 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-25 17:44:44,316 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-11-25 17:44:44,326 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-25 17:44:44,385 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 8 [2022-11-25 17:44:44,387 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-25 17:44:44,389 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 19 [2022-11-25 17:44:44,391 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-25 17:44:44,394 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 34 [2022-11-25 17:44:44,396 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-25 17:44:44,423 INFO L134 CoverageAnalysis]: Checked inductivity of 56 backedges. 31 proven. 9 refuted. 0 times theorem prover too weak. 16 trivial. 0 not checked. [2022-11-25 17:44:44,423 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-11-25 17:44:44,424 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [565922796] [2022-11-25 17:44:44,424 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [565922796] provided 0 perfect and 1 imperfect interpolant sequences [2022-11-25 17:44:44,424 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1574353938] [2022-11-25 17:44:44,424 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 [2022-11-25 17:44:44,424 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-11-25 17:44:44,424 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_a460571b-f395-45fb-9a27-7e8e20061ee7/bin/uautomizer-ZsLfNo2U6R/z3 [2022-11-25 17:44:44,427 INFO L229 MonitoredProcess]: Starting monitored process 15 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_a460571b-f395-45fb-9a27-7e8e20061ee7/bin/uautomizer-ZsLfNo2U6R/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-11-25 17:44:44,450 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_a460571b-f395-45fb-9a27-7e8e20061ee7/bin/uautomizer-ZsLfNo2U6R/z3 -smt2 -in SMTLIB2_COMPLIANT=true (15)] Waiting until timeout for monitored process [2022-11-25 17:44:44,536 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 3 check-sat command(s) [2022-11-25 17:44:44,536 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-11-25 17:44:44,537 INFO L263 TraceCheckSpWp]: Trace formula consists of 172 conjuncts, 7 conjunts are in the unsatisfiable core [2022-11-25 17:44:44,538 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-11-25 17:44:44,628 INFO L134 CoverageAnalysis]: Checked inductivity of 56 backedges. 36 proven. 4 refuted. 0 times theorem prover too weak. 16 trivial. 0 not checked. [2022-11-25 17:44:44,628 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-11-25 17:44:44,746 INFO L134 CoverageAnalysis]: Checked inductivity of 56 backedges. 36 proven. 4 refuted. 0 times theorem prover too weak. 16 trivial. 0 not checked. [2022-11-25 17:44:44,746 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1574353938] provided 0 perfect and 2 imperfect interpolant sequences [2022-11-25 17:44:44,746 INFO L184 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-11-25 17:44:44,746 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [9, 8, 9] total 14 [2022-11-25 17:44:44,746 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [83269290] [2022-11-25 17:44:44,747 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-11-25 17:44:44,747 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 14 states [2022-11-25 17:44:44,747 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-11-25 17:44:44,748 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 14 interpolants. [2022-11-25 17:44:44,748 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=47, Invalid=135, Unknown=0, NotChecked=0, Total=182 [2022-11-25 17:44:44,748 INFO L87 Difference]: Start difference. First operand 948 states and 1331 transitions. Second operand has 14 states, 14 states have (on average 4.714285714285714) internal successors, (66), 14 states have internal predecessors, (66), 1 states have call successors, (6), 2 states have call predecessors, (6), 4 states have return successors, (6), 2 states have call predecessors, (6), 1 states have call successors, (6) [2022-11-25 17:44:44,965 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-11-25 17:44:44,965 INFO L93 Difference]: Finished difference Result 1098 states and 1515 transitions. [2022-11-25 17:44:44,968 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 14 states. [2022-11-25 17:44:44,968 INFO L78 Accepts]: Start accepts. Automaton has has 14 states, 14 states have (on average 4.714285714285714) internal successors, (66), 14 states have internal predecessors, (66), 1 states have call successors, (6), 2 states have call predecessors, (6), 4 states have return successors, (6), 2 states have call predecessors, (6), 1 states have call successors, (6) Word has length 51 [2022-11-25 17:44:44,968 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-11-25 17:44:44,970 INFO L225 Difference]: With dead ends: 1098 [2022-11-25 17:44:44,970 INFO L226 Difference]: Without dead ends: 376 [2022-11-25 17:44:44,972 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 119 GetRequests, 99 SyntacticMatches, 5 SemanticMatches, 15 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 75 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=65, Invalid=207, Unknown=0, NotChecked=0, Total=272 [2022-11-25 17:44:44,973 INFO L413 NwaCegarLoop]: 43 mSDtfsCounter, 100 mSDsluCounter, 168 mSDsCounter, 0 mSdLazyCounter, 132 mSolverCounterSat, 11 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 102 SdHoareTripleChecker+Valid, 211 SdHoareTripleChecker+Invalid, 143 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 11 IncrementalHoareTripleChecker+Valid, 132 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2022-11-25 17:44:44,973 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [102 Valid, 211 Invalid, 143 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [11 Valid, 132 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2022-11-25 17:44:44,974 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 376 states. [2022-11-25 17:44:45,033 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 376 to 344. [2022-11-25 17:44:45,034 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 344 states, 313 states have (on average 1.3258785942492013) internal successors, (415), 321 states have internal predecessors, (415), 14 states have call successors, (14), 11 states have call predecessors, (14), 16 states have return successors, (25), 11 states have call predecessors, (25), 14 states have call successors, (25) [2022-11-25 17:44:45,035 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 344 states to 344 states and 454 transitions. [2022-11-25 17:44:45,035 INFO L78 Accepts]: Start accepts. Automaton has 344 states and 454 transitions. Word has length 51 [2022-11-25 17:44:45,036 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-11-25 17:44:45,036 INFO L495 AbstractCegarLoop]: Abstraction has 344 states and 454 transitions. [2022-11-25 17:44:45,036 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 14 states, 14 states have (on average 4.714285714285714) internal successors, (66), 14 states have internal predecessors, (66), 1 states have call successors, (6), 2 states have call predecessors, (6), 4 states have return successors, (6), 2 states have call predecessors, (6), 1 states have call successors, (6) [2022-11-25 17:44:45,036 INFO L276 IsEmpty]: Start isEmpty. Operand 344 states and 454 transitions. [2022-11-25 17:44:45,037 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 52 [2022-11-25 17:44:45,037 INFO L187 NwaCegarLoop]: Found error trace [2022-11-25 17:44:45,038 INFO L195 NwaCegarLoop]: trace histogram [3, 3, 3, 3, 3, 3, 3, 3, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-11-25 17:44:45,050 INFO L552 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_a460571b-f395-45fb-9a27-7e8e20061ee7/bin/uautomizer-ZsLfNo2U6R/z3 -smt2 -in SMTLIB2_COMPLIANT=true (15)] Ended with exit code 0 [2022-11-25 17:44:45,244 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 15 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_a460571b-f395-45fb-9a27-7e8e20061ee7/bin/uautomizer-ZsLfNo2U6R/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable15 [2022-11-25 17:44:45,244 INFO L420 AbstractCegarLoop]: === Iteration 17 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-11-25 17:44:45,244 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-11-25 17:44:45,244 INFO L85 PathProgramCache]: Analyzing trace with hash 1697282982, now seen corresponding path program 1 times [2022-11-25 17:44:45,245 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-11-25 17:44:45,245 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [789728663] [2022-11-25 17:44:45,245 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-25 17:44:45,245 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-11-25 17:44:45,264 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-25 17:44:45,959 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 8 [2022-11-25 17:44:45,962 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-25 17:44:46,074 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 21 [2022-11-25 17:44:46,076 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-25 17:44:46,162 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 37 [2022-11-25 17:44:46,165 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-25 17:44:46,469 INFO L134 CoverageAnalysis]: Checked inductivity of 44 backedges. 1 proven. 35 refuted. 0 times theorem prover too weak. 8 trivial. 0 not checked. [2022-11-25 17:44:46,470 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-11-25 17:44:46,470 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [789728663] [2022-11-25 17:44:46,470 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [789728663] provided 0 perfect and 1 imperfect interpolant sequences [2022-11-25 17:44:46,470 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [402152490] [2022-11-25 17:44:46,470 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-25 17:44:46,474 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-11-25 17:44:46,474 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_a460571b-f395-45fb-9a27-7e8e20061ee7/bin/uautomizer-ZsLfNo2U6R/z3 [2022-11-25 17:44:46,475 INFO L229 MonitoredProcess]: Starting monitored process 16 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_a460571b-f395-45fb-9a27-7e8e20061ee7/bin/uautomizer-ZsLfNo2U6R/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-11-25 17:44:46,477 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_a460571b-f395-45fb-9a27-7e8e20061ee7/bin/uautomizer-ZsLfNo2U6R/z3 -smt2 -in SMTLIB2_COMPLIANT=true (16)] Waiting until timeout for monitored process [2022-11-25 17:44:46,570 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-25 17:44:46,571 INFO L263 TraceCheckSpWp]: Trace formula consists of 208 conjuncts, 33 conjunts are in the unsatisfiable core [2022-11-25 17:44:46,573 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-11-25 17:44:46,654 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-25 17:44:46,655 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 1 select indices, 1 select index equivalence classes, 1 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 29 treesize of output 21 [2022-11-25 17:44:46,865 INFO L134 CoverageAnalysis]: Checked inductivity of 44 backedges. 25 proven. 13 refuted. 0 times theorem prover too weak. 6 trivial. 0 not checked. [2022-11-25 17:44:46,865 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-11-25 17:44:47,140 INFO L134 CoverageAnalysis]: Checked inductivity of 44 backedges. 2 proven. 33 refuted. 0 times theorem prover too weak. 9 trivial. 0 not checked. [2022-11-25 17:44:47,140 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [402152490] provided 0 perfect and 2 imperfect interpolant sequences [2022-11-25 17:44:47,140 INFO L184 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-11-25 17:44:47,140 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [20, 11, 9] total 33 [2022-11-25 17:44:47,140 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [620176986] [2022-11-25 17:44:47,141 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-11-25 17:44:47,141 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 33 states [2022-11-25 17:44:47,141 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-11-25 17:44:47,142 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 33 interpolants. [2022-11-25 17:44:47,142 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=112, Invalid=944, Unknown=0, NotChecked=0, Total=1056 [2022-11-25 17:44:47,142 INFO L87 Difference]: Start difference. First operand 344 states and 454 transitions. Second operand has 33 states, 30 states have (on average 3.3333333333333335) internal successors, (100), 29 states have internal predecessors, (100), 8 states have call successors, (9), 3 states have call predecessors, (9), 7 states have return successors, (9), 5 states have call predecessors, (9), 8 states have call successors, (9) [2022-11-25 17:44:49,201 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.00s for a HTC check with result UNKNOWN. Formula has sorts [Array, Bool, Int], hasArrays=true, hasNonlinArith=false, quantifiers [0] [2022-11-25 17:44:52,833 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.00s for a HTC check with result UNKNOWN. Formula has sorts [Array, Bool, Int], hasArrays=true, hasNonlinArith=false, quantifiers [0] [2022-11-25 17:44:56,109 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.00s for a HTC check with result UNKNOWN. Formula has sorts [Array, Bool, Int], hasArrays=true, hasNonlinArith=false, quantifiers [0] [2022-11-25 17:44:57,835 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 1.60s for a HTC check with result UNKNOWN. Formula has sorts [Array, Bool, Int], hasArrays=true, hasNonlinArith=false, quantifiers [0] [2022-11-25 17:44:59,851 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.00s for a HTC check with result UNKNOWN. Formula has sorts [Array, Bool, Int], hasArrays=true, hasNonlinArith=false, quantifiers [0] [2022-11-25 17:45:02,182 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.00s for a HTC check with result UNKNOWN. Formula has sorts [Array, Bool, Int], hasArrays=true, hasNonlinArith=false, quantifiers [0] [2022-11-25 17:45:04,357 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 1.97s for a HTC check with result UNKNOWN. Formula has sorts [Array, Bool, Int], hasArrays=true, hasNonlinArith=false, quantifiers [0] [2022-11-25 17:45:06,550 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.00s for a HTC check with result UNKNOWN. Formula has sorts [Array, Bool, Int], hasArrays=true, hasNonlinArith=false, quantifiers [0] [2022-11-25 17:45:08,623 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.00s for a HTC check with result UNKNOWN. Formula has sorts [Array, Bool, Int], hasArrays=true, hasNonlinArith=false, quantifiers [0] [2022-11-25 17:45:08,826 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-11-25 17:45:08,827 INFO L93 Difference]: Finished difference Result 771 states and 989 transitions. [2022-11-25 17:45:08,827 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 62 states. [2022-11-25 17:45:08,827 INFO L78 Accepts]: Start accepts. Automaton has has 33 states, 30 states have (on average 3.3333333333333335) internal successors, (100), 29 states have internal predecessors, (100), 8 states have call successors, (9), 3 states have call predecessors, (9), 7 states have return successors, (9), 5 states have call predecessors, (9), 8 states have call successors, (9) Word has length 51 [2022-11-25 17:45:08,828 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-11-25 17:45:08,829 INFO L225 Difference]: With dead ends: 771 [2022-11-25 17:45:08,830 INFO L226 Difference]: Without dead ends: 529 [2022-11-25 17:45:08,831 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 190 GetRequests, 106 SyntacticMatches, 1 SemanticMatches, 83 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1787 ImplicationChecksByTransitivity, 3.8s TimeCoverageRelationStatistics Valid=1063, Invalid=6077, Unknown=0, NotChecked=0, Total=7140 [2022-11-25 17:45:08,832 INFO L413 NwaCegarLoop]: 46 mSDtfsCounter, 366 mSDsluCounter, 559 mSDsCounter, 0 mSdLazyCounter, 1020 mSolverCounterSat, 102 mSolverCounterUnsat, 9 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 18.3s Time, 0 mProtectedPredicate, 0 mProtectedAction, 371 SdHoareTripleChecker+Valid, 605 SdHoareTripleChecker+Invalid, 1131 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 102 IncrementalHoareTripleChecker+Valid, 1020 IncrementalHoareTripleChecker+Invalid, 9 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 18.4s IncrementalHoareTripleChecker+Time [2022-11-25 17:45:08,832 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [371 Valid, 605 Invalid, 1131 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [102 Valid, 1020 Invalid, 9 Unknown, 0 Unchecked, 18.4s Time] [2022-11-25 17:45:08,833 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 529 states. [2022-11-25 17:45:08,908 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 529 to 426. [2022-11-25 17:45:08,908 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 426 states, 385 states have (on average 1.2961038961038962) internal successors, (499), 395 states have internal predecessors, (499), 18 states have call successors, (18), 15 states have call predecessors, (18), 22 states have return successors, (35), 15 states have call predecessors, (35), 18 states have call successors, (35) [2022-11-25 17:45:08,910 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 426 states to 426 states and 552 transitions. [2022-11-25 17:45:08,910 INFO L78 Accepts]: Start accepts. Automaton has 426 states and 552 transitions. Word has length 51 [2022-11-25 17:45:08,910 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-11-25 17:45:08,910 INFO L495 AbstractCegarLoop]: Abstraction has 426 states and 552 transitions. [2022-11-25 17:45:08,911 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 33 states, 30 states have (on average 3.3333333333333335) internal successors, (100), 29 states have internal predecessors, (100), 8 states have call successors, (9), 3 states have call predecessors, (9), 7 states have return successors, (9), 5 states have call predecessors, (9), 8 states have call successors, (9) [2022-11-25 17:45:08,911 INFO L276 IsEmpty]: Start isEmpty. Operand 426 states and 552 transitions. [2022-11-25 17:45:08,912 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 53 [2022-11-25 17:45:08,912 INFO L187 NwaCegarLoop]: Found error trace [2022-11-25 17:45:08,912 INFO L195 NwaCegarLoop]: trace histogram [3, 3, 3, 3, 3, 3, 3, 3, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-11-25 17:45:08,922 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_a460571b-f395-45fb-9a27-7e8e20061ee7/bin/uautomizer-ZsLfNo2U6R/z3 -smt2 -in SMTLIB2_COMPLIANT=true (16)] Forceful destruction successful, exit code 0 [2022-11-25 17:45:09,118 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 16 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_a460571b-f395-45fb-9a27-7e8e20061ee7/bin/uautomizer-ZsLfNo2U6R/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable16 [2022-11-25 17:45:09,118 INFO L420 AbstractCegarLoop]: === Iteration 18 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-11-25 17:45:09,118 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-11-25 17:45:09,118 INFO L85 PathProgramCache]: Analyzing trace with hash -652971376, now seen corresponding path program 1 times [2022-11-25 17:45:09,118 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-11-25 17:45:09,119 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [821431988] [2022-11-25 17:45:09,119 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-25 17:45:09,119 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-11-25 17:45:09,148 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-25 17:45:09,642 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 8 [2022-11-25 17:45:09,644 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-25 17:45:09,696 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 21 [2022-11-25 17:45:09,698 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-25 17:45:09,725 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 38 [2022-11-25 17:45:09,728 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-25 17:45:09,846 INFO L134 CoverageAnalysis]: Checked inductivity of 45 backedges. 0 proven. 28 refuted. 0 times theorem prover too weak. 17 trivial. 0 not checked. [2022-11-25 17:45:09,846 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-11-25 17:45:09,847 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [821431988] [2022-11-25 17:45:09,847 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [821431988] provided 0 perfect and 1 imperfect interpolant sequences [2022-11-25 17:45:09,847 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [959811316] [2022-11-25 17:45:09,847 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-25 17:45:09,847 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-11-25 17:45:09,848 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_a460571b-f395-45fb-9a27-7e8e20061ee7/bin/uautomizer-ZsLfNo2U6R/z3 [2022-11-25 17:45:09,848 INFO L229 MonitoredProcess]: Starting monitored process 17 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_a460571b-f395-45fb-9a27-7e8e20061ee7/bin/uautomizer-ZsLfNo2U6R/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-11-25 17:45:09,851 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_a460571b-f395-45fb-9a27-7e8e20061ee7/bin/uautomizer-ZsLfNo2U6R/z3 -smt2 -in SMTLIB2_COMPLIANT=true (17)] Waiting until timeout for monitored process [2022-11-25 17:45:09,943 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-25 17:45:09,945 INFO L263 TraceCheckSpWp]: Trace formula consists of 209 conjuncts, 38 conjunts are in the unsatisfiable core [2022-11-25 17:45:09,947 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-11-25 17:45:10,228 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 16 treesize of output 8 [2022-11-25 17:45:10,287 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 1 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 16 treesize of output 12 [2022-11-25 17:45:10,458 INFO L134 CoverageAnalysis]: Checked inductivity of 45 backedges. 12 proven. 30 refuted. 0 times theorem prover too weak. 3 trivial. 0 not checked. [2022-11-25 17:45:10,459 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-11-25 17:45:10,595 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 18 treesize of output 16 [2022-11-25 17:45:10,596 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 26 treesize of output 22 [2022-11-25 17:45:10,692 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 7 treesize of output 3 [2022-11-25 17:45:10,942 INFO L134 CoverageAnalysis]: Checked inductivity of 45 backedges. 25 proven. 15 refuted. 0 times theorem prover too weak. 5 trivial. 0 not checked. [2022-11-25 17:45:10,942 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [959811316] provided 0 perfect and 2 imperfect interpolant sequences [2022-11-25 17:45:10,942 INFO L184 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-11-25 17:45:10,942 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [15, 16, 14] total 39 [2022-11-25 17:45:10,942 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [644785208] [2022-11-25 17:45:10,942 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-11-25 17:45:10,943 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 39 states [2022-11-25 17:45:10,943 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-11-25 17:45:10,944 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 39 interpolants. [2022-11-25 17:45:10,944 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=173, Invalid=1309, Unknown=0, NotChecked=0, Total=1482 [2022-11-25 17:45:10,944 INFO L87 Difference]: Start difference. First operand 426 states and 552 transitions. Second operand has 39 states, 37 states have (on average 3.135135135135135) internal successors, (116), 34 states have internal predecessors, (116), 5 states have call successors, (9), 3 states have call predecessors, (9), 8 states have return successors, (9), 7 states have call predecessors, (9), 5 states have call successors, (9) [2022-11-25 17:45:13,053 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.00s for a HTC check with result UNKNOWN. Formula has sorts [Array, Bool, Int], hasArrays=true, hasNonlinArith=false, quantifiers [0] [2022-11-25 17:45:15,094 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.00s for a HTC check with result UNKNOWN. Formula has sorts [Array, Bool, Int], hasArrays=true, hasNonlinArith=false, quantifiers [0] [2022-11-25 17:45:17,176 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.00s for a HTC check with result UNKNOWN. Formula has sorts [Array, Bool, Int], hasArrays=true, hasNonlinArith=false, quantifiers [0] [2022-11-25 17:45:20,185 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.00s for a HTC check with result UNKNOWN. Formula has sorts [Array, Bool, Int], hasArrays=true, hasNonlinArith=false, quantifiers [0] [2022-11-25 17:45:22,483 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 1.65s for a HTC check with result UNKNOWN. Formula has sorts [Array, Bool, Int], hasArrays=true, hasNonlinArith=false, quantifiers [0] [2022-11-25 17:45:24,510 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 1.92s for a HTC check with result UNKNOWN. Formula has sorts [Array, Bool, Int], hasArrays=true, hasNonlinArith=false, quantifiers [0] [2022-11-25 17:45:26,516 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.00s for a HTC check with result UNKNOWN. Formula has sorts [Array, Bool, Int], hasArrays=true, hasNonlinArith=false, quantifiers [0] [2022-11-25 17:45:28,626 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.01s for a HTC check with result UNKNOWN. Formula has sorts [Array, Bool, Int], hasArrays=true, hasNonlinArith=false, quantifiers [0] [2022-11-25 17:45:30,743 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.00s for a HTC check with result UNKNOWN. Formula has sorts [Array, Bool, Int], hasArrays=true, hasNonlinArith=false, quantifiers [0] [2022-11-25 17:45:32,777 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.00s for a HTC check with result UNKNOWN. Formula has sorts [Array, Bool, Int], hasArrays=true, hasNonlinArith=false, quantifiers [0] [2022-11-25 17:45:32,974 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-11-25 17:45:32,974 INFO L93 Difference]: Finished difference Result 536 states and 676 transitions. [2022-11-25 17:45:32,974 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 62 states. [2022-11-25 17:45:32,975 INFO L78 Accepts]: Start accepts. Automaton has has 39 states, 37 states have (on average 3.135135135135135) internal successors, (116), 34 states have internal predecessors, (116), 5 states have call successors, (9), 3 states have call predecessors, (9), 8 states have return successors, (9), 7 states have call predecessors, (9), 5 states have call successors, (9) Word has length 52 [2022-11-25 17:45:32,975 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-11-25 17:45:32,976 INFO L225 Difference]: With dead ends: 536 [2022-11-25 17:45:32,976 INFO L226 Difference]: Without dead ends: 499 [2022-11-25 17:45:32,978 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 185 GetRequests, 97 SyntacticMatches, 3 SemanticMatches, 85 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 2458 ImplicationChecksByTransitivity, 2.3s TimeCoverageRelationStatistics Valid=1020, Invalid=6462, Unknown=0, NotChecked=0, Total=7482 [2022-11-25 17:45:32,980 INFO L413 NwaCegarLoop]: 43 mSDtfsCounter, 243 mSDsluCounter, 534 mSDsCounter, 0 mSdLazyCounter, 992 mSolverCounterSat, 62 mSolverCounterUnsat, 10 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 20.2s Time, 0 mProtectedPredicate, 0 mProtectedAction, 246 SdHoareTripleChecker+Valid, 577 SdHoareTripleChecker+Invalid, 1064 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 62 IncrementalHoareTripleChecker+Valid, 992 IncrementalHoareTripleChecker+Invalid, 10 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 20.3s IncrementalHoareTripleChecker+Time [2022-11-25 17:45:32,980 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [246 Valid, 577 Invalid, 1064 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [62 Valid, 992 Invalid, 10 Unknown, 0 Unchecked, 20.3s Time] [2022-11-25 17:45:32,981 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 499 states. [2022-11-25 17:45:33,056 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 499 to 393. [2022-11-25 17:45:33,057 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 393 states, 356 states have (on average 1.303370786516854) internal successors, (464), 365 states have internal predecessors, (464), 16 states have call successors, (16), 13 states have call predecessors, (16), 20 states have return successors, (31), 14 states have call predecessors, (31), 16 states have call successors, (31) [2022-11-25 17:45:33,058 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 393 states to 393 states and 511 transitions. [2022-11-25 17:45:33,058 INFO L78 Accepts]: Start accepts. Automaton has 393 states and 511 transitions. Word has length 52 [2022-11-25 17:45:33,059 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-11-25 17:45:33,059 INFO L495 AbstractCegarLoop]: Abstraction has 393 states and 511 transitions. [2022-11-25 17:45:33,059 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 39 states, 37 states have (on average 3.135135135135135) internal successors, (116), 34 states have internal predecessors, (116), 5 states have call successors, (9), 3 states have call predecessors, (9), 8 states have return successors, (9), 7 states have call predecessors, (9), 5 states have call successors, (9) [2022-11-25 17:45:33,059 INFO L276 IsEmpty]: Start isEmpty. Operand 393 states and 511 transitions. [2022-11-25 17:45:33,060 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 54 [2022-11-25 17:45:33,060 INFO L187 NwaCegarLoop]: Found error trace [2022-11-25 17:45:33,061 INFO L195 NwaCegarLoop]: trace histogram [3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-11-25 17:45:33,072 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_a460571b-f395-45fb-9a27-7e8e20061ee7/bin/uautomizer-ZsLfNo2U6R/z3 -smt2 -in SMTLIB2_COMPLIANT=true (17)] Forceful destruction successful, exit code 0 [2022-11-25 17:45:33,266 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable17,17 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_a460571b-f395-45fb-9a27-7e8e20061ee7/bin/uautomizer-ZsLfNo2U6R/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-11-25 17:45:33,267 INFO L420 AbstractCegarLoop]: === Iteration 19 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-11-25 17:45:33,267 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-11-25 17:45:33,267 INFO L85 PathProgramCache]: Analyzing trace with hash -1312615502, now seen corresponding path program 1 times [2022-11-25 17:45:33,267 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-11-25 17:45:33,267 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2079688740] [2022-11-25 17:45:33,267 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-25 17:45:33,267 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-11-25 17:45:33,286 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-25 17:45:33,535 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 8 [2022-11-25 17:45:33,537 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-25 17:45:33,594 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 21 [2022-11-25 17:45:33,597 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-25 17:45:33,626 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 38 [2022-11-25 17:45:33,628 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-25 17:45:33,661 INFO L134 CoverageAnalysis]: Checked inductivity of 47 backedges. 6 proven. 3 refuted. 0 times theorem prover too weak. 38 trivial. 0 not checked. [2022-11-25 17:45:33,662 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-11-25 17:45:33,662 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [2079688740] [2022-11-25 17:45:33,662 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [2079688740] provided 0 perfect and 1 imperfect interpolant sequences [2022-11-25 17:45:33,662 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1284587963] [2022-11-25 17:45:33,662 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-25 17:45:33,663 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-11-25 17:45:33,663 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_a460571b-f395-45fb-9a27-7e8e20061ee7/bin/uautomizer-ZsLfNo2U6R/z3 [2022-11-25 17:45:33,667 INFO L229 MonitoredProcess]: Starting monitored process 18 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_a460571b-f395-45fb-9a27-7e8e20061ee7/bin/uautomizer-ZsLfNo2U6R/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-11-25 17:45:33,690 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_a460571b-f395-45fb-9a27-7e8e20061ee7/bin/uautomizer-ZsLfNo2U6R/z3 -smt2 -in SMTLIB2_COMPLIANT=true (18)] Waiting until timeout for monitored process [2022-11-25 17:45:33,787 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-25 17:45:33,789 INFO L263 TraceCheckSpWp]: Trace formula consists of 210 conjuncts, 31 conjunts are in the unsatisfiable core [2022-11-25 17:45:33,790 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-11-25 17:45:33,931 INFO L134 CoverageAnalysis]: Checked inductivity of 47 backedges. 6 proven. 3 refuted. 0 times theorem prover too weak. 38 trivial. 0 not checked. [2022-11-25 17:45:33,932 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-11-25 17:45:34,166 INFO L134 CoverageAnalysis]: Checked inductivity of 47 backedges. 6 proven. 3 refuted. 0 times theorem prover too weak. 38 trivial. 0 not checked. [2022-11-25 17:45:34,166 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1284587963] provided 0 perfect and 2 imperfect interpolant sequences [2022-11-25 17:45:34,166 INFO L184 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-11-25 17:45:34,166 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [11, 11, 11] total 15 [2022-11-25 17:45:34,166 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1825857500] [2022-11-25 17:45:34,166 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-11-25 17:45:34,167 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 15 states [2022-11-25 17:45:34,167 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-11-25 17:45:34,167 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 15 interpolants. [2022-11-25 17:45:34,167 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=37, Invalid=173, Unknown=0, NotChecked=0, Total=210 [2022-11-25 17:45:34,168 INFO L87 Difference]: Start difference. First operand 393 states and 511 transitions. Second operand has 15 states, 14 states have (on average 2.2857142857142856) internal successors, (32), 11 states have internal predecessors, (32), 3 states have call successors, (3), 1 states have call predecessors, (3), 1 states have return successors, (4), 4 states have call predecessors, (4), 3 states have call successors, (4) [2022-11-25 17:45:34,334 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-11-25 17:45:34,334 INFO L93 Difference]: Finished difference Result 882 states and 1232 transitions. [2022-11-25 17:45:34,335 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 11 states. [2022-11-25 17:45:34,335 INFO L78 Accepts]: Start accepts. Automaton has has 15 states, 14 states have (on average 2.2857142857142856) internal successors, (32), 11 states have internal predecessors, (32), 3 states have call successors, (3), 1 states have call predecessors, (3), 1 states have return successors, (4), 4 states have call predecessors, (4), 3 states have call successors, (4) Word has length 53 [2022-11-25 17:45:34,335 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-11-25 17:45:34,338 INFO L225 Difference]: With dead ends: 882 [2022-11-25 17:45:34,338 INFO L226 Difference]: Without dead ends: 567 [2022-11-25 17:45:34,340 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 128 GetRequests, 104 SyntacticMatches, 10 SemanticMatches, 14 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 50 ImplicationChecksByTransitivity, 0.2s TimeCoverageRelationStatistics Valid=42, Invalid=198, Unknown=0, NotChecked=0, Total=240 [2022-11-25 17:45:34,341 INFO L413 NwaCegarLoop]: 42 mSDtfsCounter, 20 mSDsluCounter, 262 mSDsCounter, 0 mSdLazyCounter, 112 mSolverCounterSat, 4 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 23 SdHoareTripleChecker+Valid, 304 SdHoareTripleChecker+Invalid, 116 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 4 IncrementalHoareTripleChecker+Valid, 112 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2022-11-25 17:45:34,341 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [23 Valid, 304 Invalid, 116 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [4 Valid, 112 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2022-11-25 17:45:34,342 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 567 states. [2022-11-25 17:45:34,446 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 567 to 480. [2022-11-25 17:45:34,447 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 480 states, 420 states have (on average 1.2357142857142858) internal successors, (519), 443 states have internal predecessors, (519), 26 states have call successors, (26), 13 states have call predecessors, (26), 33 states have return successors, (76), 23 states have call predecessors, (76), 26 states have call successors, (76) [2022-11-25 17:45:34,449 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 480 states to 480 states and 621 transitions. [2022-11-25 17:45:34,449 INFO L78 Accepts]: Start accepts. Automaton has 480 states and 621 transitions. Word has length 53 [2022-11-25 17:45:34,450 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-11-25 17:45:34,450 INFO L495 AbstractCegarLoop]: Abstraction has 480 states and 621 transitions. [2022-11-25 17:45:34,450 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 15 states, 14 states have (on average 2.2857142857142856) internal successors, (32), 11 states have internal predecessors, (32), 3 states have call successors, (3), 1 states have call predecessors, (3), 1 states have return successors, (4), 4 states have call predecessors, (4), 3 states have call successors, (4) [2022-11-25 17:45:34,450 INFO L276 IsEmpty]: Start isEmpty. Operand 480 states and 621 transitions. [2022-11-25 17:45:34,452 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 54 [2022-11-25 17:45:34,452 INFO L187 NwaCegarLoop]: Found error trace [2022-11-25 17:45:34,452 INFO L195 NwaCegarLoop]: trace histogram [3, 3, 3, 3, 3, 3, 3, 3, 3, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-11-25 17:45:34,462 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_a460571b-f395-45fb-9a27-7e8e20061ee7/bin/uautomizer-ZsLfNo2U6R/z3 -smt2 -in SMTLIB2_COMPLIANT=true (18)] Forceful destruction successful, exit code 0 [2022-11-25 17:45:34,658 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable18,18 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_a460571b-f395-45fb-9a27-7e8e20061ee7/bin/uautomizer-ZsLfNo2U6R/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-11-25 17:45:34,658 INFO L420 AbstractCegarLoop]: === Iteration 20 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-11-25 17:45:34,659 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-11-25 17:45:34,659 INFO L85 PathProgramCache]: Analyzing trace with hash -1705642512, now seen corresponding path program 1 times [2022-11-25 17:45:34,659 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-11-25 17:45:34,659 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [578277613] [2022-11-25 17:45:34,659 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-25 17:45:34,659 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-11-25 17:45:34,683 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-25 17:45:35,234 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 8 [2022-11-25 17:45:35,236 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-25 17:45:35,342 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 21 [2022-11-25 17:45:35,344 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-25 17:45:35,347 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 38 [2022-11-25 17:45:35,349 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-25 17:45:35,462 INFO L134 CoverageAnalysis]: Checked inductivity of 47 backedges. 12 proven. 24 refuted. 0 times theorem prover too weak. 11 trivial. 0 not checked. [2022-11-25 17:45:35,462 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-11-25 17:45:35,462 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [578277613] [2022-11-25 17:45:35,462 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [578277613] provided 0 perfect and 1 imperfect interpolant sequences [2022-11-25 17:45:35,463 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [626944633] [2022-11-25 17:45:35,463 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-25 17:45:35,463 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-11-25 17:45:35,463 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_a460571b-f395-45fb-9a27-7e8e20061ee7/bin/uautomizer-ZsLfNo2U6R/z3 [2022-11-25 17:45:35,464 INFO L229 MonitoredProcess]: Starting monitored process 19 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_a460571b-f395-45fb-9a27-7e8e20061ee7/bin/uautomizer-ZsLfNo2U6R/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-11-25 17:45:35,466 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_a460571b-f395-45fb-9a27-7e8e20061ee7/bin/uautomizer-ZsLfNo2U6R/z3 -smt2 -in SMTLIB2_COMPLIANT=true (19)] Waiting until timeout for monitored process [2022-11-25 17:45:35,566 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-25 17:45:35,568 INFO L263 TraceCheckSpWp]: Trace formula consists of 210 conjuncts, 59 conjunts are in the unsatisfiable core [2022-11-25 17:45:35,571 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-11-25 17:45:35,616 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 13 treesize of output 9 [2022-11-25 17:45:35,737 INFO L173 IndexEqualityManager]: detected equality via solver [2022-11-25 17:45:35,740 INFO L321 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2022-11-25 17:45:35,740 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 3 select indices, 3 select index equivalence classes, 1 disjoint index pairs (out of 3 index pairs), introduced 3 new quantified variables, introduced 3 case distinctions, treesize of input 38 treesize of output 30 [2022-11-25 17:45:35,852 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-25 17:45:35,853 INFO L173 IndexEqualityManager]: detected equality via solver [2022-11-25 17:45:35,856 INFO L321 Elim1Store]: treesize reduction 2, result has 33.3 percent of original size [2022-11-25 17:45:35,856 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 3 select indices, 3 select index equivalence classes, 1 disjoint index pairs (out of 3 index pairs), introduced 3 new quantified variables, introduced 3 case distinctions, treesize of input 36 treesize of output 30 [2022-11-25 17:45:35,905 INFO L173 IndexEqualityManager]: detected equality via solver [2022-11-25 17:45:35,929 INFO L321 Elim1Store]: treesize reduction 73, result has 21.5 percent of original size [2022-11-25 17:45:35,929 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 3 select indices, 3 select index equivalence classes, 1 disjoint index pairs (out of 3 index pairs), introduced 3 new quantified variables, introduced 6 case distinctions, treesize of input 34 treesize of output 35 [2022-11-25 17:45:36,655 INFO L134 CoverageAnalysis]: Checked inductivity of 47 backedges. 18 proven. 27 refuted. 0 times theorem prover too weak. 2 trivial. 0 not checked. [2022-11-25 17:45:36,656 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-11-25 17:45:43,258 INFO L134 CoverageAnalysis]: Checked inductivity of 47 backedges. 14 proven. 25 refuted. 0 times theorem prover too weak. 8 trivial. 0 not checked. [2022-11-25 17:45:43,258 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [626944633] provided 0 perfect and 2 imperfect interpolant sequences [2022-11-25 17:45:43,258 INFO L184 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-11-25 17:45:43,258 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [13, 15, 11] total 33 [2022-11-25 17:45:43,258 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [81799109] [2022-11-25 17:45:43,259 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-11-25 17:45:43,259 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 33 states [2022-11-25 17:45:43,259 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-11-25 17:45:43,260 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 33 interpolants. [2022-11-25 17:45:43,260 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=126, Invalid=928, Unknown=2, NotChecked=0, Total=1056 [2022-11-25 17:45:43,260 INFO L87 Difference]: Start difference. First operand 480 states and 621 transitions. Second operand has 33 states, 33 states have (on average 3.3333333333333335) internal successors, (110), 33 states have internal predecessors, (110), 6 states have call successors, (9), 2 states have call predecessors, (9), 7 states have return successors, (9), 4 states have call predecessors, (9), 6 states have call successors, (9) [2022-11-25 17:45:45,314 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.00s for a HTC check with result UNKNOWN. Formula has sorts [Array, Bool, Int], hasArrays=true, hasNonlinArith=false, quantifiers [0] [2022-11-25 17:45:47,378 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.00s for a HTC check with result UNKNOWN. Formula has sorts [Array, Bool, Int], hasArrays=true, hasNonlinArith=false, quantifiers [0] [2022-11-25 17:45:49,410 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.00s for a HTC check with result UNKNOWN. Formula has sorts [Array, Bool, Int], hasArrays=true, hasNonlinArith=false, quantifiers [0] [2022-11-25 17:45:51,743 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.00s for a HTC check with result UNKNOWN. Formula has sorts [Array, Bool, Int], hasArrays=true, hasNonlinArith=false, quantifiers [0] [2022-11-25 17:45:54,111 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.00s for a HTC check with result UNKNOWN. Formula has sorts [Array, Bool, Int], hasArrays=true, hasNonlinArith=false, quantifiers [0] [2022-11-25 17:45:56,048 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 1.89s for a HTC check with result UNKNOWN. Formula has sorts [Array, Bool, Int], hasArrays=true, hasNonlinArith=false, quantifiers [0] [2022-11-25 17:45:58,078 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.00s for a HTC check with result UNKNOWN. Formula has sorts [Array, Bool, Int], hasArrays=true, hasNonlinArith=false, quantifiers [0] [2022-11-25 17:45:58,250 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-11-25 17:45:58,250 INFO L93 Difference]: Finished difference Result 660 states and 841 transitions. [2022-11-25 17:45:58,251 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 22 states. [2022-11-25 17:45:58,251 INFO L78 Accepts]: Start accepts. Automaton has has 33 states, 33 states have (on average 3.3333333333333335) internal successors, (110), 33 states have internal predecessors, (110), 6 states have call successors, (9), 2 states have call predecessors, (9), 7 states have return successors, (9), 4 states have call predecessors, (9), 6 states have call successors, (9) Word has length 53 [2022-11-25 17:45:58,251 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-11-25 17:45:58,254 INFO L225 Difference]: With dead ends: 660 [2022-11-25 17:45:58,254 INFO L226 Difference]: Without dead ends: 629 [2022-11-25 17:45:58,255 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 140 GetRequests, 91 SyntacticMatches, 5 SemanticMatches, 44 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 525 ImplicationChecksByTransitivity, 7.8s TimeCoverageRelationStatistics Valid=270, Invalid=1798, Unknown=2, NotChecked=0, Total=2070 [2022-11-25 17:45:58,256 INFO L413 NwaCegarLoop]: 40 mSDtfsCounter, 111 mSDsluCounter, 353 mSDsCounter, 0 mSdLazyCounter, 737 mSolverCounterSat, 34 mSolverCounterUnsat, 7 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 14.4s Time, 0 mProtectedPredicate, 0 mProtectedAction, 117 SdHoareTripleChecker+Valid, 393 SdHoareTripleChecker+Invalid, 778 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 34 IncrementalHoareTripleChecker+Valid, 737 IncrementalHoareTripleChecker+Invalid, 7 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 14.5s IncrementalHoareTripleChecker+Time [2022-11-25 17:45:58,256 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [117 Valid, 393 Invalid, 778 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [34 Valid, 737 Invalid, 7 Unknown, 0 Unchecked, 14.5s Time] [2022-11-25 17:45:58,263 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 629 states. [2022-11-25 17:45:58,391 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 629 to 560. [2022-11-25 17:45:58,392 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 560 states, 491 states have (on average 1.2281059063136457) internal successors, (603), 518 states have internal predecessors, (603), 29 states have call successors, (29), 15 states have call predecessors, (29), 39 states have return successors, (80), 26 states have call predecessors, (80), 29 states have call successors, (80) [2022-11-25 17:45:58,394 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 560 states to 560 states and 712 transitions. [2022-11-25 17:45:58,394 INFO L78 Accepts]: Start accepts. Automaton has 560 states and 712 transitions. Word has length 53 [2022-11-25 17:45:58,395 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-11-25 17:45:58,395 INFO L495 AbstractCegarLoop]: Abstraction has 560 states and 712 transitions. [2022-11-25 17:45:58,395 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 33 states, 33 states have (on average 3.3333333333333335) internal successors, (110), 33 states have internal predecessors, (110), 6 states have call successors, (9), 2 states have call predecessors, (9), 7 states have return successors, (9), 4 states have call predecessors, (9), 6 states have call successors, (9) [2022-11-25 17:45:58,395 INFO L276 IsEmpty]: Start isEmpty. Operand 560 states and 712 transitions. [2022-11-25 17:45:58,397 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 54 [2022-11-25 17:45:58,397 INFO L187 NwaCegarLoop]: Found error trace [2022-11-25 17:45:58,397 INFO L195 NwaCegarLoop]: trace histogram [3, 3, 3, 3, 3, 3, 3, 3, 3, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-11-25 17:45:58,404 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_a460571b-f395-45fb-9a27-7e8e20061ee7/bin/uautomizer-ZsLfNo2U6R/z3 -smt2 -in SMTLIB2_COMPLIANT=true (19)] Forceful destruction successful, exit code 0 [2022-11-25 17:45:58,603 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable19,19 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_a460571b-f395-45fb-9a27-7e8e20061ee7/bin/uautomizer-ZsLfNo2U6R/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-11-25 17:45:58,604 INFO L420 AbstractCegarLoop]: === Iteration 21 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-11-25 17:45:58,604 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-11-25 17:45:58,604 INFO L85 PathProgramCache]: Analyzing trace with hash 1610544496, now seen corresponding path program 2 times [2022-11-25 17:45:58,604 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-11-25 17:45:58,605 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1599887335] [2022-11-25 17:45:58,605 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-25 17:45:58,605 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-11-25 17:45:58,631 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-25 17:45:58,983 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 8 [2022-11-25 17:45:58,986 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-25 17:45:59,097 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 21 [2022-11-25 17:45:59,099 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-25 17:45:59,181 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 38 [2022-11-25 17:45:59,183 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-25 17:45:59,186 INFO L134 CoverageAnalysis]: Checked inductivity of 47 backedges. 0 proven. 34 refuted. 0 times theorem prover too weak. 13 trivial. 0 not checked. [2022-11-25 17:45:59,187 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-11-25 17:45:59,187 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1599887335] [2022-11-25 17:45:59,187 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1599887335] provided 0 perfect and 1 imperfect interpolant sequences [2022-11-25 17:45:59,187 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [425084953] [2022-11-25 17:45:59,187 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 [2022-11-25 17:45:59,188 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-11-25 17:45:59,188 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_a460571b-f395-45fb-9a27-7e8e20061ee7/bin/uautomizer-ZsLfNo2U6R/z3 [2022-11-25 17:45:59,189 INFO L229 MonitoredProcess]: Starting monitored process 20 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_a460571b-f395-45fb-9a27-7e8e20061ee7/bin/uautomizer-ZsLfNo2U6R/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-11-25 17:45:59,210 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_a460571b-f395-45fb-9a27-7e8e20061ee7/bin/uautomizer-ZsLfNo2U6R/z3 -smt2 -in SMTLIB2_COMPLIANT=true (20)] Waiting until timeout for monitored process [2022-11-25 17:45:59,330 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2022-11-25 17:45:59,330 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-11-25 17:45:59,332 INFO L263 TraceCheckSpWp]: Trace formula consists of 210 conjuncts, 47 conjunts are in the unsatisfiable core [2022-11-25 17:45:59,334 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-11-25 17:45:59,380 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 13 treesize of output 9 [2022-11-25 17:45:59,507 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-25 17:45:59,510 INFO L321 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2022-11-25 17:45:59,510 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 2 select indices, 2 select index equivalence classes, 1 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 1 case distinctions, treesize of input 41 treesize of output 21 [2022-11-25 17:45:59,694 INFO L134 CoverageAnalysis]: Checked inductivity of 47 backedges. 31 proven. 14 refuted. 0 times theorem prover too weak. 2 trivial. 0 not checked. [2022-11-25 17:45:59,694 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-11-25 17:45:59,972 INFO L134 CoverageAnalysis]: Checked inductivity of 47 backedges. 2 proven. 36 refuted. 0 times theorem prover too weak. 9 trivial. 0 not checked. [2022-11-25 17:45:59,972 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [425084953] provided 0 perfect and 2 imperfect interpolant sequences [2022-11-25 17:45:59,972 INFO L184 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-11-25 17:45:59,972 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [8, 13, 9] total 25 [2022-11-25 17:45:59,972 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [463498770] [2022-11-25 17:45:59,972 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-11-25 17:45:59,973 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 25 states [2022-11-25 17:45:59,973 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-11-25 17:45:59,973 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 25 interpolants. [2022-11-25 17:45:59,973 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=85, Invalid=515, Unknown=0, NotChecked=0, Total=600 [2022-11-25 17:45:59,974 INFO L87 Difference]: Start difference. First operand 560 states and 712 transitions. Second operand has 25 states, 25 states have (on average 3.92) internal successors, (98), 24 states have internal predecessors, (98), 7 states have call successors, (8), 3 states have call predecessors, (8), 7 states have return successors, (8), 4 states have call predecessors, (8), 7 states have call successors, (8) [2022-11-25 17:46:00,919 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-11-25 17:46:00,919 INFO L93 Difference]: Finished difference Result 827 states and 1054 transitions. [2022-11-25 17:46:00,920 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 22 states. [2022-11-25 17:46:00,920 INFO L78 Accepts]: Start accepts. Automaton has has 25 states, 25 states have (on average 3.92) internal successors, (98), 24 states have internal predecessors, (98), 7 states have call successors, (8), 3 states have call predecessors, (8), 7 states have return successors, (8), 4 states have call predecessors, (8), 7 states have call successors, (8) Word has length 53 [2022-11-25 17:46:00,920 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-11-25 17:46:00,922 INFO L225 Difference]: With dead ends: 827 [2022-11-25 17:46:00,922 INFO L226 Difference]: Without dead ends: 581 [2022-11-25 17:46:00,923 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 141 GetRequests, 106 SyntacticMatches, 0 SemanticMatches, 35 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 277 ImplicationChecksByTransitivity, 0.7s TimeCoverageRelationStatistics Valid=204, Invalid=1128, Unknown=0, NotChecked=0, Total=1332 [2022-11-25 17:46:00,924 INFO L413 NwaCegarLoop]: 45 mSDtfsCounter, 82 mSDsluCounter, 421 mSDsCounter, 0 mSdLazyCounter, 735 mSolverCounterSat, 7 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.5s Time, 0 mProtectedPredicate, 0 mProtectedAction, 89 SdHoareTripleChecker+Valid, 466 SdHoareTripleChecker+Invalid, 742 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 7 IncrementalHoareTripleChecker+Valid, 735 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.6s IncrementalHoareTripleChecker+Time [2022-11-25 17:46:00,924 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [89 Valid, 466 Invalid, 742 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [7 Valid, 735 Invalid, 0 Unknown, 0 Unchecked, 0.6s Time] [2022-11-25 17:46:00,925 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 581 states. [2022-11-25 17:46:01,037 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 581 to 518. [2022-11-25 17:46:01,038 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 518 states, 454 states have (on average 1.2290748898678414) internal successors, (558), 478 states have internal predecessors, (558), 28 states have call successors, (28), 14 states have call predecessors, (28), 35 states have return successors, (74), 25 states have call predecessors, (74), 28 states have call successors, (74) [2022-11-25 17:46:01,040 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 518 states to 518 states and 660 transitions. [2022-11-25 17:46:01,040 INFO L78 Accepts]: Start accepts. Automaton has 518 states and 660 transitions. Word has length 53 [2022-11-25 17:46:01,041 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-11-25 17:46:01,041 INFO L495 AbstractCegarLoop]: Abstraction has 518 states and 660 transitions. [2022-11-25 17:46:01,041 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 25 states, 25 states have (on average 3.92) internal successors, (98), 24 states have internal predecessors, (98), 7 states have call successors, (8), 3 states have call predecessors, (8), 7 states have return successors, (8), 4 states have call predecessors, (8), 7 states have call successors, (8) [2022-11-25 17:46:01,041 INFO L276 IsEmpty]: Start isEmpty. Operand 518 states and 660 transitions. [2022-11-25 17:46:01,042 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 54 [2022-11-25 17:46:01,043 INFO L187 NwaCegarLoop]: Found error trace [2022-11-25 17:46:01,043 INFO L195 NwaCegarLoop]: trace histogram [3, 3, 3, 3, 3, 3, 3, 3, 3, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-11-25 17:46:01,058 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_a460571b-f395-45fb-9a27-7e8e20061ee7/bin/uautomizer-ZsLfNo2U6R/z3 -smt2 -in SMTLIB2_COMPLIANT=true (20)] Forceful destruction successful, exit code 0 [2022-11-25 17:46:01,250 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable20,20 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_a460571b-f395-45fb-9a27-7e8e20061ee7/bin/uautomizer-ZsLfNo2U6R/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-11-25 17:46:01,250 INFO L420 AbstractCegarLoop]: === Iteration 22 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-11-25 17:46:01,251 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-11-25 17:46:01,251 INFO L85 PathProgramCache]: Analyzing trace with hash -761194766, now seen corresponding path program 3 times [2022-11-25 17:46:01,251 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-11-25 17:46:01,251 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [556806188] [2022-11-25 17:46:01,251 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-25 17:46:01,251 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-11-25 17:46:01,274 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-25 17:46:01,856 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 8 [2022-11-25 17:46:01,862 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-25 17:46:01,868 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 21 [2022-11-25 17:46:01,871 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-25 17:46:01,994 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 38 [2022-11-25 17:46:01,996 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-25 17:46:02,103 INFO L134 CoverageAnalysis]: Checked inductivity of 47 backedges. 25 proven. 15 refuted. 0 times theorem prover too weak. 7 trivial. 0 not checked. [2022-11-25 17:46:02,104 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-11-25 17:46:02,104 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [556806188] [2022-11-25 17:46:02,104 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [556806188] provided 0 perfect and 1 imperfect interpolant sequences [2022-11-25 17:46:02,104 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1070750775] [2022-11-25 17:46:02,105 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 [2022-11-25 17:46:02,105 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-11-25 17:46:02,105 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_a460571b-f395-45fb-9a27-7e8e20061ee7/bin/uautomizer-ZsLfNo2U6R/z3 [2022-11-25 17:46:02,107 INFO L229 MonitoredProcess]: Starting monitored process 21 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_a460571b-f395-45fb-9a27-7e8e20061ee7/bin/uautomizer-ZsLfNo2U6R/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-11-25 17:46:02,118 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_a460571b-f395-45fb-9a27-7e8e20061ee7/bin/uautomizer-ZsLfNo2U6R/z3 -smt2 -in SMTLIB2_COMPLIANT=true (21)] Waiting until timeout for monitored process [2022-11-25 17:46:02,261 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 5 check-sat command(s) [2022-11-25 17:46:02,262 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-11-25 17:46:02,264 INFO L263 TraceCheckSpWp]: Trace formula consists of 210 conjuncts, 56 conjunts are in the unsatisfiable core [2022-11-25 17:46:02,266 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-11-25 17:46:02,486 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-25 17:46:02,489 INFO L321 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2022-11-25 17:46:02,489 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 2 select indices, 2 select index equivalence classes, 1 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 1 case distinctions, treesize of input 41 treesize of output 21 [2022-11-25 17:46:02,645 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-25 17:46:02,652 INFO L321 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2022-11-25 17:46:02,653 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 2 select indices, 2 select index equivalence classes, 1 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 1 case distinctions, treesize of input 39 treesize of output 24 [2022-11-25 17:46:02,718 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-25 17:46:02,719 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-25 17:46:02,743 INFO L321 Elim1Store]: treesize reduction 17, result has 46.9 percent of original size [2022-11-25 17:46:02,743 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 2 select indices, 2 select index equivalence classes, 2 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 2 case distinctions, treesize of input 40 treesize of output 42 [2022-11-25 17:46:03,458 INFO L134 CoverageAnalysis]: Checked inductivity of 47 backedges. 9 proven. 33 refuted. 0 times theorem prover too weak. 5 trivial. 0 not checked. [2022-11-25 17:46:03,460 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-11-25 17:46:04,060 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 70 treesize of output 54 [2022-11-25 17:46:04,065 INFO L321 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2022-11-25 17:46:04,065 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 1 case distinctions, treesize of input 70 treesize of output 52 [2022-11-25 17:46:04,351 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 70 treesize of output 54 [2022-11-25 17:46:04,356 INFO L321 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2022-11-25 17:46:04,357 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 1 case distinctions, treesize of input 70 treesize of output 1 [2022-11-25 17:46:04,389 INFO L134 CoverageAnalysis]: Checked inductivity of 47 backedges. 13 proven. 26 refuted. 0 times theorem prover too weak. 8 trivial. 0 not checked. [2022-11-25 17:46:04,389 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1070750775] provided 0 perfect and 2 imperfect interpolant sequences [2022-11-25 17:46:04,389 INFO L184 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-11-25 17:46:04,389 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [15, 18, 15] total 44 [2022-11-25 17:46:04,389 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2080921462] [2022-11-25 17:46:04,389 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-11-25 17:46:04,390 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 44 states [2022-11-25 17:46:04,390 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-11-25 17:46:04,391 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 44 interpolants. [2022-11-25 17:46:04,391 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=244, Invalid=1648, Unknown=0, NotChecked=0, Total=1892 [2022-11-25 17:46:04,391 INFO L87 Difference]: Start difference. First operand 518 states and 660 transitions. Second operand has 44 states, 42 states have (on average 2.738095238095238) internal successors, (115), 42 states have internal predecessors, (115), 8 states have call successors, (9), 4 states have call predecessors, (9), 8 states have return successors, (9), 5 states have call predecessors, (9), 8 states have call successors, (9) [2022-11-25 17:46:10,104 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-11-25 17:46:10,105 INFO L93 Difference]: Finished difference Result 697 states and 874 transitions. [2022-11-25 17:46:10,106 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 72 states. [2022-11-25 17:46:10,107 INFO L78 Accepts]: Start accepts. Automaton has has 44 states, 42 states have (on average 2.738095238095238) internal successors, (115), 42 states have internal predecessors, (115), 8 states have call successors, (9), 4 states have call predecessors, (9), 8 states have return successors, (9), 5 states have call predecessors, (9), 8 states have call successors, (9) Word has length 53 [2022-11-25 17:46:10,107 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-11-25 17:46:10,110 INFO L225 Difference]: With dead ends: 697 [2022-11-25 17:46:10,110 INFO L226 Difference]: Without dead ends: 681 [2022-11-25 17:46:10,111 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 193 GetRequests, 91 SyntacticMatches, 3 SemanticMatches, 99 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 3361 ImplicationChecksByTransitivity, 5.6s TimeCoverageRelationStatistics Valid=1383, Invalid=8717, Unknown=0, NotChecked=0, Total=10100 [2022-11-25 17:46:10,112 INFO L413 NwaCegarLoop]: 51 mSDtfsCounter, 421 mSDsluCounter, 554 mSDsCounter, 0 mSdLazyCounter, 1364 mSolverCounterSat, 104 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 1.2s Time, 0 mProtectedPredicate, 0 mProtectedAction, 426 SdHoareTripleChecker+Valid, 605 SdHoareTripleChecker+Invalid, 1468 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 104 IncrementalHoareTripleChecker+Valid, 1364 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 1.4s IncrementalHoareTripleChecker+Time [2022-11-25 17:46:10,113 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [426 Valid, 605 Invalid, 1468 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [104 Valid, 1364 Invalid, 0 Unknown, 0 Unchecked, 1.4s Time] [2022-11-25 17:46:10,114 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 681 states. [2022-11-25 17:46:10,242 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 681 to 563. [2022-11-25 17:46:10,243 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 563 states, 495 states have (on average 1.2383838383838384) internal successors, (613), 522 states have internal predecessors, (613), 29 states have call successors, (29), 15 states have call predecessors, (29), 38 states have return successors, (83), 25 states have call predecessors, (83), 29 states have call successors, (83) [2022-11-25 17:46:10,245 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 563 states to 563 states and 725 transitions. [2022-11-25 17:46:10,245 INFO L78 Accepts]: Start accepts. Automaton has 563 states and 725 transitions. Word has length 53 [2022-11-25 17:46:10,246 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-11-25 17:46:10,246 INFO L495 AbstractCegarLoop]: Abstraction has 563 states and 725 transitions. [2022-11-25 17:46:10,246 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 44 states, 42 states have (on average 2.738095238095238) internal successors, (115), 42 states have internal predecessors, (115), 8 states have call successors, (9), 4 states have call predecessors, (9), 8 states have return successors, (9), 5 states have call predecessors, (9), 8 states have call successors, (9) [2022-11-25 17:46:10,246 INFO L276 IsEmpty]: Start isEmpty. Operand 563 states and 725 transitions. [2022-11-25 17:46:10,248 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 54 [2022-11-25 17:46:10,248 INFO L187 NwaCegarLoop]: Found error trace [2022-11-25 17:46:10,248 INFO L195 NwaCegarLoop]: trace histogram [3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-11-25 17:46:10,259 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_a460571b-f395-45fb-9a27-7e8e20061ee7/bin/uautomizer-ZsLfNo2U6R/z3 -smt2 -in SMTLIB2_COMPLIANT=true (21)] Forceful destruction successful, exit code 0 [2022-11-25 17:46:10,454 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable21,21 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_a460571b-f395-45fb-9a27-7e8e20061ee7/bin/uautomizer-ZsLfNo2U6R/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-11-25 17:46:10,454 INFO L420 AbstractCegarLoop]: === Iteration 23 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-11-25 17:46:10,455 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-11-25 17:46:10,455 INFO L85 PathProgramCache]: Analyzing trace with hash -1154221776, now seen corresponding path program 1 times [2022-11-25 17:46:10,455 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-11-25 17:46:10,455 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [958094420] [2022-11-25 17:46:10,455 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-25 17:46:10,455 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-11-25 17:46:10,488 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is sat [2022-11-25 17:46:10,489 INFO L356 TraceCheck]: Trace is feasible, we will do another trace check, this time with branch encoders. [2022-11-25 17:46:10,518 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is sat [2022-11-25 17:46:10,565 INFO L130 FreeRefinementEngine]: Strategy CAMEL found a feasible trace [2022-11-25 17:46:10,571 INFO L360 BasicCegarLoop]: Counterexample is feasible [2022-11-25 17:46:10,572 INFO L805 garLoopResultBuilder]: Registering result UNSAFE for location ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION (0 of 1 remaining) [2022-11-25 17:46:10,574 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable22 [2022-11-25 17:46:10,579 INFO L445 BasicCegarLoop]: Path program histogram: [4, 3, 3, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-11-25 17:46:10,583 INFO L178 ceAbstractionStarter]: Computing trace abstraction results [2022-11-25 17:46:10,661 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction CFG 25.11 05:46:10 BoogieIcfgContainer [2022-11-25 17:46:10,661 INFO L132 PluginConnector]: ------------------------ END TraceAbstraction---------------------------- [2022-11-25 17:46:10,662 INFO L113 PluginConnector]: ------------------------Witness Printer---------------------------- [2022-11-25 17:46:10,662 INFO L271 PluginConnector]: Initializing Witness Printer... [2022-11-25 17:46:10,662 INFO L275 PluginConnector]: Witness Printer initialized [2022-11-25 17:46:10,663 INFO L185 PluginConnector]: Executing the observer RCFGCatcher from plugin Witness Printer for "de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 25.11 05:41:47" (3/4) ... [2022-11-25 17:46:10,666 INFO L140 WitnessPrinter]: No result that supports witness generation found [2022-11-25 17:46:10,666 INFO L132 PluginConnector]: ------------------------ END Witness Printer---------------------------- [2022-11-25 17:46:10,667 INFO L158 Benchmark]: Toolchain (without parser) took 263868.96ms. Allocated memory was 174.1MB in the beginning and 362.8MB in the end (delta: 188.7MB). Free memory was 143.0MB in the beginning and 148.9MB in the end (delta: -5.8MB). Peak memory consumption was 183.6MB. Max. memory is 16.1GB. [2022-11-25 17:46:10,667 INFO L158 Benchmark]: CDTParser took 0.25ms. Allocated memory is still 125.8MB. Free memory is still 95.4MB. There was no memory consumed. Max. memory is 16.1GB. [2022-11-25 17:46:10,668 INFO L158 Benchmark]: CACSL2BoogieTranslator took 344.70ms. Allocated memory is still 174.1MB. Free memory was 143.0MB in the beginning and 141.3MB in the end (delta: 1.8MB). Peak memory consumption was 8.4MB. Max. memory is 16.1GB. [2022-11-25 17:46:10,668 INFO L158 Benchmark]: Boogie Procedure Inliner took 62.57ms. Allocated memory is still 174.1MB. Free memory was 141.3MB in the beginning and 139.6MB in the end (delta: 1.6MB). Peak memory consumption was 2.1MB. Max. memory is 16.1GB. [2022-11-25 17:46:10,673 INFO L158 Benchmark]: Boogie Preprocessor took 57.23ms. Allocated memory is still 174.1MB. Free memory was 139.6MB in the beginning and 138.4MB in the end (delta: 1.2MB). Peak memory consumption was 2.1MB. Max. memory is 16.1GB. [2022-11-25 17:46:10,675 INFO L158 Benchmark]: RCFGBuilder took 477.35ms. Allocated memory is still 174.1MB. Free memory was 138.4MB in the beginning and 124.9MB in the end (delta: 13.5MB). Peak memory consumption was 12.6MB. Max. memory is 16.1GB. [2022-11-25 17:46:10,675 INFO L158 Benchmark]: TraceAbstraction took 262913.31ms. Allocated memory was 174.1MB in the beginning and 362.8MB in the end (delta: 188.7MB). Free memory was 123.7MB in the beginning and 148.9MB in the end (delta: -25.1MB). Peak memory consumption was 166.5MB. Max. memory is 16.1GB. [2022-11-25 17:46:10,676 INFO L158 Benchmark]: Witness Printer took 4.29ms. Allocated memory is still 362.8MB. Free memory is still 148.9MB. There was no memory consumed. Max. memory is 16.1GB. [2022-11-25 17:46:10,678 INFO L339 ainManager$Toolchain]: ####################### End [Toolchain 1] ####################### --- Results --- * Results from de.uni_freiburg.informatik.ultimate.core: - StatisticsResult: Toolchain Benchmarks Benchmark results are: * CDTParser took 0.25ms. Allocated memory is still 125.8MB. Free memory is still 95.4MB. There was no memory consumed. Max. memory is 16.1GB. * CACSL2BoogieTranslator took 344.70ms. Allocated memory is still 174.1MB. Free memory was 143.0MB in the beginning and 141.3MB in the end (delta: 1.8MB). Peak memory consumption was 8.4MB. Max. memory is 16.1GB. * Boogie Procedure Inliner took 62.57ms. Allocated memory is still 174.1MB. Free memory was 141.3MB in the beginning and 139.6MB in the end (delta: 1.6MB). Peak memory consumption was 2.1MB. Max. memory is 16.1GB. * Boogie Preprocessor took 57.23ms. Allocated memory is still 174.1MB. Free memory was 139.6MB in the beginning and 138.4MB in the end (delta: 1.2MB). Peak memory consumption was 2.1MB. Max. memory is 16.1GB. * RCFGBuilder took 477.35ms. Allocated memory is still 174.1MB. Free memory was 138.4MB in the beginning and 124.9MB in the end (delta: 13.5MB). Peak memory consumption was 12.6MB. Max. memory is 16.1GB. * TraceAbstraction took 262913.31ms. Allocated memory was 174.1MB in the beginning and 362.8MB in the end (delta: 188.7MB). Free memory was 123.7MB in the beginning and 148.9MB in the end (delta: -25.1MB). Peak memory consumption was 166.5MB. Max. memory is 16.1GB. * Witness Printer took 4.29ms. Allocated memory is still 362.8MB. Free memory is still 148.9MB. There was no memory consumed. Max. memory is 16.1GB. * Results from de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction: - StatisticsResult: ErrorAutomatonStatistics NumberErrorTraces: 0, NumberStatementsAllTraces: 0, NumberRelevantStatements: 0, 0.0s ErrorAutomatonConstructionTimeTotal, 0.0s FaulLocalizationTime, NumberStatementsFirstTrace: -1, TraceLengthAvg: 0, 0.0s ErrorAutomatonConstructionTimeAvg, 0.0s ErrorAutomatonDifferenceTimeAvg, 0.0s ErrorAutomatonDifferenceTimeTotal, NumberOfNoEnhancement: 0, NumberOfFiniteEnhancement: 0, NumberOfInfiniteEnhancement: 0 - UnprovableResult [Line: 57]: Unable to prove that call to reach_error is unreachable Unable to prove that call to reach_error is unreachable Reason: overapproximation of bitwiseXor at line 25. Possible FailurePath: [L17] int N; VAL [N=0] [L32] N = __VERIFIER_nondet_int() [L33] COND TRUE N > 1 [L34] int x[N]; [L35] int temp; [L36] int ret; [L37] int ret2; [L38] int ret5; [L40] int i = 0; VAL [i=0, N=2, x={9:0}] [L40] COND TRUE i < N [L42] x[i] = __VERIFIER_nondet_int() [L40] i++ VAL [i=1, N=2, x={9:0}] [L40] COND TRUE i < N [L42] x[i] = __VERIFIER_nondet_int() [L40] i++ VAL [i=2, N=2, x={9:0}] [L40] COND FALSE !(i < N) VAL [i=2, N=2, x={9:0}] [L45] CALL, EXPR xor(x) VAL [N=2, x={9:0}] [L21] int i; [L22] long long res; [L23] EXPR x[0] [L23] res = x[0] [L24] i = 1 VAL [i=1, N=2, res=-3, x={9:0}, x={9:0}] [L24] COND TRUE i < N [L25] EXPR x[i] VAL [i=1, N=2, res=-3, x={9:0}, x={9:0}, x[i]=-2] [L25] res = res ^ x[i] [L24] i++ VAL [i=2, N=2, res=4294967291, x={9:0}, x={9:0}] [L24] COND FALSE !(i < N) VAL [i=2, N=2, res=4294967291, x={9:0}, x={9:0}] [L27] return res; VAL [\result=-5, i=2, N=2, res=4294967291, x={9:0}, x={9:0}] [L45] RET, EXPR xor(x) VAL [i=2, N=2, x={9:0}, xor(x)=-5] [L45] ret = xor(x) [L47] EXPR x[0] [L47] temp=x[0] [L47] EXPR x[1] [L47] x[0] = x[1] [L47] x[1] = temp VAL [i=2, N=2, ret=-5, temp=-3, x={9:0}] [L48] CALL, EXPR xor(x) VAL [N=2, x={9:0}] [L21] int i; [L22] long long res; [L23] EXPR x[0] [L23] res = x[0] [L24] i = 1 VAL [i=1, N=2, res=-2, x={9:0}, x={9:0}] [L24] COND TRUE i < N [L25] EXPR x[i] VAL [i=1, N=2, res=-2, x={9:0}, x={9:0}, x[i]=-3] [L25] res = res ^ x[i] [L24] i++ VAL [i=2, N=2, res=4294967288, x={9:0}, x={9:0}] [L24] COND FALSE !(i < N) VAL [i=2, N=2, res=4294967288, x={9:0}, x={9:0}] [L27] return res; VAL [\result=-8, i=2, N=2, res=4294967288, x={9:0}, x={9:0}] [L48] RET, EXPR xor(x) VAL [i=2, N=2, ret=-5, temp=-3, x={9:0}, xor(x)=-8] [L48] ret2 = xor(x) [L49] EXPR x[0] [L49] temp=x[0] [L50] int i =0 ; VAL [i=2, i=0, N=2, ret=-5, ret2=-8, temp=-2, x={9:0}] [L50] COND TRUE i main Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Witness directory -> /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_a460571b-f395-45fb-9a27-7e8e20061ee7/bin/uautomizer-ZsLfNo2U6R Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Witness filename -> witness.graphml Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Write witness besides input file -> false Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data specification -> CHECK( init(main()), LTL(G ! call(reach_error())) ) Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data producer -> Automizer Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data architecture -> 32bit Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data programhash -> a4ee2cdc1f0cbbd62309a70b71e98ce771ffa71f4ebd85e731799a93fbbc3919 [2022-11-25 17:46:13,686 INFO L75 nceAwareModelManager]: Repository-Root is: /tmp [2022-11-25 17:46:13,711 INFO L261 ainManager$Toolchain]: [Toolchain 1]: Applicable parser(s) successfully (re)initialized [2022-11-25 17:46:13,714 INFO L217 ainManager$Toolchain]: [Toolchain 1]: Toolchain selected. [2022-11-25 17:46:13,715 INFO L271 PluginConnector]: Initializing CDTParser... [2022-11-25 17:46:13,716 INFO L275 PluginConnector]: CDTParser initialized [2022-11-25 17:46:13,717 INFO L432 ainManager$Toolchain]: [Toolchain 1]: Parsing single file: /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_a460571b-f395-45fb-9a27-7e8e20061ee7/bin/uautomizer-ZsLfNo2U6R/../../sv-benchmarks/c/array-crafted/xor5.i [2022-11-25 17:46:16,967 INFO L500 CDTParser]: Created temporary CDT project at NULL [2022-11-25 17:46:17,187 INFO L351 CDTParser]: Found 1 translation units. [2022-11-25 17:46:17,187 INFO L172 CDTParser]: Scanning /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_a460571b-f395-45fb-9a27-7e8e20061ee7/sv-benchmarks/c/array-crafted/xor5.i [2022-11-25 17:46:17,196 INFO L394 CDTParser]: About to delete temporary CDT project at /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_a460571b-f395-45fb-9a27-7e8e20061ee7/bin/uautomizer-ZsLfNo2U6R/data/75ca0a5ca/39f8b8ae835243b9a3d1bc49fd53b17f/FLAGf85d1fe4a [2022-11-25 17:46:17,221 INFO L402 CDTParser]: Successfully deleted /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_a460571b-f395-45fb-9a27-7e8e20061ee7/bin/uautomizer-ZsLfNo2U6R/data/75ca0a5ca/39f8b8ae835243b9a3d1bc49fd53b17f [2022-11-25 17:46:17,224 INFO L299 ainManager$Toolchain]: ####################### [Toolchain 1] ####################### [2022-11-25 17:46:17,226 INFO L131 ToolchainWalker]: Walking toolchain with 6 elements. [2022-11-25 17:46:17,228 INFO L113 PluginConnector]: ------------------------CACSL2BoogieTranslator---------------------------- [2022-11-25 17:46:17,232 INFO L271 PluginConnector]: Initializing CACSL2BoogieTranslator... [2022-11-25 17:46:17,237 INFO L275 PluginConnector]: CACSL2BoogieTranslator initialized [2022-11-25 17:46:17,238 INFO L185 PluginConnector]: Executing the observer ACSLObjectContainerObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 25.11 05:46:17" (1/1) ... [2022-11-25 17:46:17,240 INFO L205 PluginConnector]: Invalid model from CACSL2BoogieTranslator for observer de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator.ACSLObjectContainerObserver@19c29f41 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 25.11 05:46:17, skipping insertion in model container [2022-11-25 17:46:17,240 INFO L185 PluginConnector]: Executing the observer CACSL2BoogieTranslatorObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 25.11 05:46:17" (1/1) ... [2022-11-25 17:46:17,249 INFO L145 MainTranslator]: Starting translation in SV-COMP mode [2022-11-25 17:46:17,272 INFO L178 MainTranslator]: Built tables and reachable declarations [2022-11-25 17:46:17,534 WARN L237 ndardFunctionHandler]: Function reach_error is already implemented but we override the implementation for the call at /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_a460571b-f395-45fb-9a27-7e8e20061ee7/sv-benchmarks/c/array-crafted/xor5.i[1364,1377] [2022-11-25 17:46:17,539 INFO L210 PostProcessor]: Analyzing one entry point: main [2022-11-25 17:46:17,555 INFO L203 MainTranslator]: Completed pre-run [2022-11-25 17:46:17,600 WARN L237 ndardFunctionHandler]: Function reach_error is already implemented but we override the implementation for the call at /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_a460571b-f395-45fb-9a27-7e8e20061ee7/sv-benchmarks/c/array-crafted/xor5.i[1364,1377] [2022-11-25 17:46:17,601 INFO L210 PostProcessor]: Analyzing one entry point: main [2022-11-25 17:46:17,619 INFO L208 MainTranslator]: Completed translation [2022-11-25 17:46:17,620 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 25.11 05:46:17 WrapperNode [2022-11-25 17:46:17,620 INFO L132 PluginConnector]: ------------------------ END CACSL2BoogieTranslator---------------------------- [2022-11-25 17:46:17,621 INFO L113 PluginConnector]: ------------------------Boogie Procedure Inliner---------------------------- [2022-11-25 17:46:17,622 INFO L271 PluginConnector]: Initializing Boogie Procedure Inliner... [2022-11-25 17:46:17,622 INFO L275 PluginConnector]: Boogie Procedure Inliner initialized [2022-11-25 17:46:17,631 INFO L185 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Procedure Inliner for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 25.11 05:46:17" (1/1) ... [2022-11-25 17:46:17,653 INFO L185 PluginConnector]: Executing the observer Inliner from plugin Boogie Procedure Inliner for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 25.11 05:46:17" (1/1) ... [2022-11-25 17:46:17,688 INFO L138 Inliner]: procedures = 18, calls = 29, calls flagged for inlining = 2, calls inlined = 2, statements flattened = 72 [2022-11-25 17:46:17,689 INFO L132 PluginConnector]: ------------------------ END Boogie Procedure Inliner---------------------------- [2022-11-25 17:46:17,690 INFO L113 PluginConnector]: ------------------------Boogie Preprocessor---------------------------- [2022-11-25 17:46:17,691 INFO L271 PluginConnector]: Initializing Boogie Preprocessor... [2022-11-25 17:46:17,692 INFO L275 PluginConnector]: Boogie Preprocessor initialized [2022-11-25 17:46:17,718 INFO L185 PluginConnector]: Executing the observer EnsureBoogieModelObserver from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 25.11 05:46:17" (1/1) ... [2022-11-25 17:46:17,718 INFO L185 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 25.11 05:46:17" (1/1) ... [2022-11-25 17:46:17,728 INFO L185 PluginConnector]: Executing the observer ConstExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 25.11 05:46:17" (1/1) ... [2022-11-25 17:46:17,728 INFO L185 PluginConnector]: Executing the observer StructExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 25.11 05:46:17" (1/1) ... [2022-11-25 17:46:17,753 INFO L185 PluginConnector]: Executing the observer UnstructureCode from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 25.11 05:46:17" (1/1) ... [2022-11-25 17:46:17,767 INFO L185 PluginConnector]: Executing the observer FunctionInliner from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 25.11 05:46:17" (1/1) ... [2022-11-25 17:46:17,769 INFO L185 PluginConnector]: Executing the observer LTLStepAnnotator from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 25.11 05:46:17" (1/1) ... [2022-11-25 17:46:17,771 INFO L185 PluginConnector]: Executing the observer BoogieSymbolTableConstructor from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 25.11 05:46:17" (1/1) ... [2022-11-25 17:46:17,775 INFO L132 PluginConnector]: ------------------------ END Boogie Preprocessor---------------------------- [2022-11-25 17:46:17,777 INFO L113 PluginConnector]: ------------------------RCFGBuilder---------------------------- [2022-11-25 17:46:17,783 INFO L271 PluginConnector]: Initializing RCFGBuilder... [2022-11-25 17:46:17,783 INFO L275 PluginConnector]: RCFGBuilder initialized [2022-11-25 17:46:17,784 INFO L185 PluginConnector]: Executing the observer RCFGBuilderObserver from plugin RCFGBuilder for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 25.11 05:46:17" (1/1) ... [2022-11-25 17:46:17,793 INFO L173 SolverBuilder]: Constructing external solver with command: z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2022-11-25 17:46:17,809 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_a460571b-f395-45fb-9a27-7e8e20061ee7/bin/uautomizer-ZsLfNo2U6R/z3 [2022-11-25 17:46:17,828 INFO L229 MonitoredProcess]: Starting monitored process 1 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_a460571b-f395-45fb-9a27-7e8e20061ee7/bin/uautomizer-ZsLfNo2U6R/z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 (exit command is (exit), workingDir is null) [2022-11-25 17:46:17,858 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_a460571b-f395-45fb-9a27-7e8e20061ee7/bin/uautomizer-ZsLfNo2U6R/z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 (1)] Waiting until timeout for monitored process [2022-11-25 17:46:17,894 INFO L130 BoogieDeclarations]: Found specification of procedure #Ultimate.allocInit [2022-11-25 17:46:17,895 INFO L130 BoogieDeclarations]: Found specification of procedure write~init~intINTTYPE1 [2022-11-25 17:46:17,895 INFO L130 BoogieDeclarations]: Found specification of procedure #Ultimate.allocOnStack [2022-11-25 17:46:17,895 INFO L130 BoogieDeclarations]: Found specification of procedure read~intINTTYPE4 [2022-11-25 17:46:17,896 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.start [2022-11-25 17:46:17,896 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.start [2022-11-25 17:46:17,897 INFO L130 BoogieDeclarations]: Found specification of procedure xor [2022-11-25 17:46:17,897 INFO L138 BoogieDeclarations]: Found implementation of procedure xor [2022-11-25 17:46:17,897 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.dealloc [2022-11-25 17:46:17,897 INFO L130 BoogieDeclarations]: Found specification of procedure write~intINTTYPE4 [2022-11-25 17:46:18,049 INFO L235 CfgBuilder]: Building ICFG [2022-11-25 17:46:18,052 INFO L261 CfgBuilder]: Building CFG for each procedure with an implementation [2022-11-25 17:46:18,417 INFO L276 CfgBuilder]: Performing block encoding [2022-11-25 17:46:18,424 INFO L295 CfgBuilder]: Using the 1 location(s) as analysis (start of procedure ULTIMATE.start) [2022-11-25 17:46:18,425 INFO L300 CfgBuilder]: Removed 3 assume(true) statements. [2022-11-25 17:46:18,428 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 25.11 05:46:18 BoogieIcfgContainer [2022-11-25 17:46:18,428 INFO L132 PluginConnector]: ------------------------ END RCFGBuilder---------------------------- [2022-11-25 17:46:18,431 INFO L113 PluginConnector]: ------------------------TraceAbstraction---------------------------- [2022-11-25 17:46:18,431 INFO L271 PluginConnector]: Initializing TraceAbstraction... [2022-11-25 17:46:18,436 INFO L275 PluginConnector]: TraceAbstraction initialized [2022-11-25 17:46:18,436 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "CDTParser AST 25.11 05:46:17" (1/3) ... [2022-11-25 17:46:18,437 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@6f815ac7 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 25.11 05:46:18, skipping insertion in model container [2022-11-25 17:46:18,437 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 25.11 05:46:17" (2/3) ... [2022-11-25 17:46:18,438 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@6f815ac7 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 25.11 05:46:18, skipping insertion in model container [2022-11-25 17:46:18,438 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 25.11 05:46:18" (3/3) ... [2022-11-25 17:46:18,440 INFO L112 eAbstractionObserver]: Analyzing ICFG xor5.i [2022-11-25 17:46:18,480 INFO L203 ceAbstractionStarter]: Automizer settings: Hoare:true NWA Interpolation:FPandBP Determinization: PREDICATE_ABSTRACTION [2022-11-25 17:46:18,480 INFO L162 ceAbstractionStarter]: Applying trace abstraction to program that has 1 error locations. [2022-11-25 17:46:18,540 INFO L356 AbstractCegarLoop]: ======== Iteration 0 == of CEGAR loop == AllErrorsAtOnce ======== [2022-11-25 17:46:18,550 INFO L357 AbstractCegarLoop]: Settings: SEPARATE_VIOLATION_CHECK=true, mInterprocedural=true, mMaxIterations=1000000, mWatchIteration=1000000, mArtifact=RCFG, mInterpolation=FPandBP, mInterpolantAutomaton=STRAIGHT_LINE, mDumpAutomata=false, mAutomataFormat=ATS_NUMERATE, mDumpPath=., mDeterminiation=PREDICATE_ABSTRACTION, mMinimize=MINIMIZE_SEVPA, mHoare=true, mAutomataTypeConcurrency=PETRI_NET, mHoareTripleChecks=INCREMENTAL, mHoareAnnotationPositions=LoopsAndPotentialCycles, mDumpOnlyReuseAutomata=false, mLimitTraceHistogram=0, mErrorLocTimeLimit=0, mLimitPathProgramCount=0, mCollectInterpolantStatistics=true, mHeuristicEmptinessCheck=false, mHeuristicEmptinessCheckAStarHeuristic=ZERO, mHeuristicEmptinessCheckAStarHeuristicRandomSeed=1337, mHeuristicEmptinessCheckSmtFeatureScoringMethod=DAGSIZE, mSMTFeatureExtraction=false, mSMTFeatureExtractionDumpPath=., mOverrideInterpolantAutomaton=false, mMcrInterpolantMethod=WP, mPorIndependenceSettings=[Lde.uni_freiburg.informatik.ultimate.lib.tracecheckerutils.partialorder.independence.IndependenceSettings;@4bb3852e, mLbeIndependenceSettings=[IndependenceType=SEMANTIC, AbstractionType=NONE, UseConditional=false, UseSemiCommutativity=true, Solver=Z3, SolverTimeout=1000ms] [2022-11-25 17:46:18,551 INFO L358 AbstractCegarLoop]: Starting to check reachability of 1 error locations. [2022-11-25 17:46:18,556 INFO L276 IsEmpty]: Start isEmpty. Operand has 28 states, 22 states have (on average 1.4090909090909092) internal successors, (31), 23 states have internal predecessors, (31), 3 states have call successors, (3), 1 states have call predecessors, (3), 1 states have return successors, (3), 3 states have call predecessors, (3), 3 states have call successors, (3) [2022-11-25 17:46:18,569 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 30 [2022-11-25 17:46:18,569 INFO L187 NwaCegarLoop]: Found error trace [2022-11-25 17:46:18,570 INFO L195 NwaCegarLoop]: trace histogram [3, 3, 3, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-11-25 17:46:18,571 INFO L420 AbstractCegarLoop]: === Iteration 1 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-11-25 17:46:18,578 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-11-25 17:46:18,578 INFO L85 PathProgramCache]: Analyzing trace with hash 2030793856, now seen corresponding path program 1 times [2022-11-25 17:46:18,600 INFO L118 FreeRefinementEngine]: Executing refinement strategy WOLF [2022-11-25 17:46:18,602 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [76074056] [2022-11-25 17:46:18,602 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-25 17:46:18,603 INFO L173 SolverBuilder]: Constructing external solver with command: mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 [2022-11-25 17:46:18,603 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_a460571b-f395-45fb-9a27-7e8e20061ee7/bin/uautomizer-ZsLfNo2U6R/mathsat [2022-11-25 17:46:18,609 INFO L229 MonitoredProcess]: Starting monitored process 2 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_a460571b-f395-45fb-9a27-7e8e20061ee7/bin/uautomizer-ZsLfNo2U6R/mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 (exit command is (exit), workingDir is null) [2022-11-25 17:46:18,627 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_a460571b-f395-45fb-9a27-7e8e20061ee7/bin/uautomizer-ZsLfNo2U6R/mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 (2)] Waiting until timeout for monitored process [2022-11-25 17:46:18,750 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-25 17:46:18,755 INFO L263 TraceCheckSpWp]: Trace formula consists of 84 conjuncts, 1 conjunts are in the unsatisfiable core [2022-11-25 17:46:18,762 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-11-25 17:46:18,793 INFO L134 CoverageAnalysis]: Checked inductivity of 15 backedges. 6 proven. 0 refuted. 0 times theorem prover too weak. 9 trivial. 0 not checked. [2022-11-25 17:46:18,794 INFO L324 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2022-11-25 17:46:18,795 INFO L136 FreeRefinementEngine]: Strategy WOLF found an infeasible trace [2022-11-25 17:46:18,795 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [76074056] [2022-11-25 17:46:18,796 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleMathsat [76074056] provided 1 perfect and 0 imperfect interpolant sequences [2022-11-25 17:46:18,796 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-11-25 17:46:18,796 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [2] imperfect sequences [] total 2 [2022-11-25 17:46:18,798 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1982401678] [2022-11-25 17:46:18,799 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-11-25 17:46:18,804 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 2 states [2022-11-25 17:46:18,805 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WOLF [2022-11-25 17:46:18,840 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 2 interpolants. [2022-11-25 17:46:18,841 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=1, Invalid=1, Unknown=0, NotChecked=0, Total=2 [2022-11-25 17:46:18,844 INFO L87 Difference]: Start difference. First operand has 28 states, 22 states have (on average 1.4090909090909092) internal successors, (31), 23 states have internal predecessors, (31), 3 states have call successors, (3), 1 states have call predecessors, (3), 1 states have return successors, (3), 3 states have call predecessors, (3), 3 states have call successors, (3) Second operand has 2 states, 2 states have (on average 9.0) internal successors, (18), 2 states have internal predecessors, (18), 1 states have call successors, (3), 1 states have call predecessors, (3), 2 states have return successors, (3), 2 states have call predecessors, (3), 1 states have call successors, (3) [2022-11-25 17:46:18,872 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-11-25 17:46:18,873 INFO L93 Difference]: Finished difference Result 51 states and 69 transitions. [2022-11-25 17:46:18,874 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 2 states. [2022-11-25 17:46:18,875 INFO L78 Accepts]: Start accepts. Automaton has has 2 states, 2 states have (on average 9.0) internal successors, (18), 2 states have internal predecessors, (18), 1 states have call successors, (3), 1 states have call predecessors, (3), 2 states have return successors, (3), 2 states have call predecessors, (3), 1 states have call successors, (3) Word has length 29 [2022-11-25 17:46:18,876 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-11-25 17:46:18,884 INFO L225 Difference]: With dead ends: 51 [2022-11-25 17:46:18,884 INFO L226 Difference]: Without dead ends: 23 [2022-11-25 17:46:18,888 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 28 GetRequests, 28 SyntacticMatches, 0 SemanticMatches, 0 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=1, Invalid=1, Unknown=0, NotChecked=0, Total=2 [2022-11-25 17:46:18,892 INFO L413 NwaCegarLoop]: 33 mSDtfsCounter, 0 mSDsluCounter, 0 mSDsCounter, 0 mSdLazyCounter, 0 mSolverCounterSat, 0 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 0 SdHoareTripleChecker+Valid, 33 SdHoareTripleChecker+Invalid, 0 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 0 IncrementalHoareTripleChecker+Valid, 0 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.0s IncrementalHoareTripleChecker+Time [2022-11-25 17:46:18,893 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [0 Valid, 33 Invalid, 0 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [0 Valid, 0 Invalid, 0 Unknown, 0 Unchecked, 0.0s Time] [2022-11-25 17:46:18,913 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 23 states. [2022-11-25 17:46:18,932 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 23 to 23. [2022-11-25 17:46:18,933 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 23 states, 18 states have (on average 1.1666666666666667) internal successors, (21), 18 states have internal predecessors, (21), 3 states have call successors, (3), 1 states have call predecessors, (3), 1 states have return successors, (3), 3 states have call predecessors, (3), 3 states have call successors, (3) [2022-11-25 17:46:18,935 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 23 states to 23 states and 27 transitions. [2022-11-25 17:46:18,937 INFO L78 Accepts]: Start accepts. Automaton has 23 states and 27 transitions. Word has length 29 [2022-11-25 17:46:18,937 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-11-25 17:46:18,937 INFO L495 AbstractCegarLoop]: Abstraction has 23 states and 27 transitions. [2022-11-25 17:46:18,938 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 2 states, 2 states have (on average 9.0) internal successors, (18), 2 states have internal predecessors, (18), 1 states have call successors, (3), 1 states have call predecessors, (3), 2 states have return successors, (3), 2 states have call predecessors, (3), 1 states have call successors, (3) [2022-11-25 17:46:18,938 INFO L276 IsEmpty]: Start isEmpty. Operand 23 states and 27 transitions. [2022-11-25 17:46:18,940 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 30 [2022-11-25 17:46:18,940 INFO L187 NwaCegarLoop]: Found error trace [2022-11-25 17:46:18,941 INFO L195 NwaCegarLoop]: trace histogram [3, 3, 3, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-11-25 17:46:18,965 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_a460571b-f395-45fb-9a27-7e8e20061ee7/bin/uautomizer-ZsLfNo2U6R/mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 (2)] Forceful destruction successful, exit code 0 [2022-11-25 17:46:19,155 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 2 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_a460571b-f395-45fb-9a27-7e8e20061ee7/bin/uautomizer-ZsLfNo2U6R/mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 [2022-11-25 17:46:19,156 INFO L420 AbstractCegarLoop]: === Iteration 2 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-11-25 17:46:19,157 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-11-25 17:46:19,158 INFO L85 PathProgramCache]: Analyzing trace with hash -1398988038, now seen corresponding path program 1 times [2022-11-25 17:46:19,159 INFO L118 FreeRefinementEngine]: Executing refinement strategy WOLF [2022-11-25 17:46:19,160 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [611112173] [2022-11-25 17:46:19,161 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-25 17:46:19,162 INFO L173 SolverBuilder]: Constructing external solver with command: mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 [2022-11-25 17:46:19,162 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_a460571b-f395-45fb-9a27-7e8e20061ee7/bin/uautomizer-ZsLfNo2U6R/mathsat [2022-11-25 17:46:19,164 INFO L229 MonitoredProcess]: Starting monitored process 3 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_a460571b-f395-45fb-9a27-7e8e20061ee7/bin/uautomizer-ZsLfNo2U6R/mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 (exit command is (exit), workingDir is null) [2022-11-25 17:46:19,202 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_a460571b-f395-45fb-9a27-7e8e20061ee7/bin/uautomizer-ZsLfNo2U6R/mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 (3)] Waiting until timeout for monitored process [2022-11-25 17:46:19,337 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-25 17:46:19,354 INFO L263 TraceCheckSpWp]: Trace formula consists of 84 conjuncts, 3 conjunts are in the unsatisfiable core [2022-11-25 17:46:19,357 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-11-25 17:46:19,432 INFO L134 CoverageAnalysis]: Checked inductivity of 15 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 15 trivial. 0 not checked. [2022-11-25 17:46:19,432 INFO L324 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2022-11-25 17:46:19,432 INFO L136 FreeRefinementEngine]: Strategy WOLF found an infeasible trace [2022-11-25 17:46:19,433 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [611112173] [2022-11-25 17:46:19,434 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleMathsat [611112173] provided 1 perfect and 0 imperfect interpolant sequences [2022-11-25 17:46:19,435 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-11-25 17:46:19,436 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2022-11-25 17:46:19,440 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1179811113] [2022-11-25 17:46:19,441 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-11-25 17:46:19,442 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2022-11-25 17:46:19,444 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WOLF [2022-11-25 17:46:19,446 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2022-11-25 17:46:19,447 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2022-11-25 17:46:19,449 INFO L87 Difference]: Start difference. First operand 23 states and 27 transitions. Second operand has 3 states, 3 states have (on average 5.0) internal successors, (15), 3 states have internal predecessors, (15), 1 states have call successors, (3), 1 states have call predecessors, (3), 1 states have return successors, (3), 1 states have call predecessors, (3), 1 states have call successors, (3) [2022-11-25 17:46:19,525 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-11-25 17:46:19,525 INFO L93 Difference]: Finished difference Result 43 states and 51 transitions. [2022-11-25 17:46:19,526 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2022-11-25 17:46:19,527 INFO L78 Accepts]: Start accepts. Automaton has has 3 states, 3 states have (on average 5.0) internal successors, (15), 3 states have internal predecessors, (15), 1 states have call successors, (3), 1 states have call predecessors, (3), 1 states have return successors, (3), 1 states have call predecessors, (3), 1 states have call successors, (3) Word has length 29 [2022-11-25 17:46:19,528 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-11-25 17:46:19,531 INFO L225 Difference]: With dead ends: 43 [2022-11-25 17:46:19,531 INFO L226 Difference]: Without dead ends: 25 [2022-11-25 17:46:19,533 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 28 GetRequests, 27 SyntacticMatches, 0 SemanticMatches, 1 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2022-11-25 17:46:19,540 INFO L413 NwaCegarLoop]: 25 mSDtfsCounter, 1 mSDsluCounter, 16 mSDsCounter, 0 mSdLazyCounter, 12 mSolverCounterSat, 0 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 1 SdHoareTripleChecker+Valid, 41 SdHoareTripleChecker+Invalid, 12 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 0 IncrementalHoareTripleChecker+Valid, 12 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2022-11-25 17:46:19,541 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [1 Valid, 41 Invalid, 12 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [0 Valid, 12 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2022-11-25 17:46:19,543 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 25 states. [2022-11-25 17:46:19,549 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 25 to 24. [2022-11-25 17:46:19,551 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 24 states, 19 states have (on average 1.1578947368421053) internal successors, (22), 19 states have internal predecessors, (22), 3 states have call successors, (3), 1 states have call predecessors, (3), 1 states have return successors, (3), 3 states have call predecessors, (3), 3 states have call successors, (3) [2022-11-25 17:46:19,552 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 24 states to 24 states and 28 transitions. [2022-11-25 17:46:19,553 INFO L78 Accepts]: Start accepts. Automaton has 24 states and 28 transitions. Word has length 29 [2022-11-25 17:46:19,554 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-11-25 17:46:19,554 INFO L495 AbstractCegarLoop]: Abstraction has 24 states and 28 transitions. [2022-11-25 17:46:19,555 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 3 states have (on average 5.0) internal successors, (15), 3 states have internal predecessors, (15), 1 states have call successors, (3), 1 states have call predecessors, (3), 1 states have return successors, (3), 1 states have call predecessors, (3), 1 states have call successors, (3) [2022-11-25 17:46:19,555 INFO L276 IsEmpty]: Start isEmpty. Operand 24 states and 28 transitions. [2022-11-25 17:46:19,557 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 32 [2022-11-25 17:46:19,558 INFO L187 NwaCegarLoop]: Found error trace [2022-11-25 17:46:19,558 INFO L195 NwaCegarLoop]: trace histogram [3, 3, 3, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-11-25 17:46:19,577 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_a460571b-f395-45fb-9a27-7e8e20061ee7/bin/uautomizer-ZsLfNo2U6R/mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 (3)] Forceful destruction successful, exit code 0 [2022-11-25 17:46:19,777 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 3 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_a460571b-f395-45fb-9a27-7e8e20061ee7/bin/uautomizer-ZsLfNo2U6R/mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 [2022-11-25 17:46:19,778 INFO L420 AbstractCegarLoop]: === Iteration 3 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-11-25 17:46:19,778 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-11-25 17:46:19,779 INFO L85 PathProgramCache]: Analyzing trace with hash -1708163684, now seen corresponding path program 1 times [2022-11-25 17:46:19,779 INFO L118 FreeRefinementEngine]: Executing refinement strategy WOLF [2022-11-25 17:46:19,780 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [899998899] [2022-11-25 17:46:19,780 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-25 17:46:19,780 INFO L173 SolverBuilder]: Constructing external solver with command: mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 [2022-11-25 17:46:19,780 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_a460571b-f395-45fb-9a27-7e8e20061ee7/bin/uautomizer-ZsLfNo2U6R/mathsat [2022-11-25 17:46:19,782 INFO L229 MonitoredProcess]: Starting monitored process 4 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_a460571b-f395-45fb-9a27-7e8e20061ee7/bin/uautomizer-ZsLfNo2U6R/mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 (exit command is (exit), workingDir is null) [2022-11-25 17:46:19,807 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_a460571b-f395-45fb-9a27-7e8e20061ee7/bin/uautomizer-ZsLfNo2U6R/mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 (4)] Waiting until timeout for monitored process [2022-11-25 17:46:19,934 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-25 17:46:19,939 INFO L263 TraceCheckSpWp]: Trace formula consists of 89 conjuncts, 4 conjunts are in the unsatisfiable core [2022-11-25 17:46:19,942 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-11-25 17:46:20,004 INFO L134 CoverageAnalysis]: Checked inductivity of 16 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 15 trivial. 0 not checked. [2022-11-25 17:46:20,005 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-11-25 17:46:20,109 INFO L134 CoverageAnalysis]: Checked inductivity of 16 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 15 trivial. 0 not checked. [2022-11-25 17:46:20,110 INFO L136 FreeRefinementEngine]: Strategy WOLF found an infeasible trace [2022-11-25 17:46:20,110 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [899998899] [2022-11-25 17:46:20,110 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleMathsat [899998899] provided 0 perfect and 2 imperfect interpolant sequences [2022-11-25 17:46:20,110 INFO L184 FreeRefinementEngine]: Found 0 perfect and 2 imperfect interpolant sequences. [2022-11-25 17:46:20,111 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [4, 4] total 6 [2022-11-25 17:46:20,111 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [261903842] [2022-11-25 17:46:20,111 INFO L85 oduleStraightlineAll]: Using 2 imperfect interpolants to construct interpolant automaton [2022-11-25 17:46:20,112 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 6 states [2022-11-25 17:46:20,112 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WOLF [2022-11-25 17:46:20,113 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 6 interpolants. [2022-11-25 17:46:20,113 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=12, Invalid=18, Unknown=0, NotChecked=0, Total=30 [2022-11-25 17:46:20,114 INFO L87 Difference]: Start difference. First operand 24 states and 28 transitions. Second operand has 6 states, 6 states have (on average 4.166666666666667) internal successors, (25), 6 states have internal predecessors, (25), 1 states have call successors, (6), 2 states have call predecessors, (6), 2 states have return successors, (6), 1 states have call predecessors, (6), 1 states have call successors, (6) [2022-11-25 17:46:20,233 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-11-25 17:46:20,234 INFO L93 Difference]: Finished difference Result 45 states and 53 transitions. [2022-11-25 17:46:20,235 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2022-11-25 17:46:20,236 INFO L78 Accepts]: Start accepts. Automaton has has 6 states, 6 states have (on average 4.166666666666667) internal successors, (25), 6 states have internal predecessors, (25), 1 states have call successors, (6), 2 states have call predecessors, (6), 2 states have return successors, (6), 1 states have call predecessors, (6), 1 states have call successors, (6) Word has length 31 [2022-11-25 17:46:20,236 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-11-25 17:46:20,236 INFO L225 Difference]: With dead ends: 45 [2022-11-25 17:46:20,237 INFO L226 Difference]: Without dead ends: 27 [2022-11-25 17:46:20,237 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 60 GetRequests, 56 SyntacticMatches, 0 SemanticMatches, 4 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=12, Invalid=18, Unknown=0, NotChecked=0, Total=30 [2022-11-25 17:46:20,239 INFO L413 NwaCegarLoop]: 25 mSDtfsCounter, 1 mSDsluCounter, 64 mSDsCounter, 0 mSdLazyCounter, 46 mSolverCounterSat, 1 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 1 SdHoareTripleChecker+Valid, 89 SdHoareTripleChecker+Invalid, 47 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 1 IncrementalHoareTripleChecker+Valid, 46 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2022-11-25 17:46:20,239 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [1 Valid, 89 Invalid, 47 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [1 Valid, 46 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2022-11-25 17:46:20,240 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 27 states. [2022-11-25 17:46:20,245 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 27 to 26. [2022-11-25 17:46:20,246 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 26 states, 21 states have (on average 1.1428571428571428) internal successors, (24), 21 states have internal predecessors, (24), 3 states have call successors, (3), 1 states have call predecessors, (3), 1 states have return successors, (3), 3 states have call predecessors, (3), 3 states have call successors, (3) [2022-11-25 17:46:20,247 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 26 states to 26 states and 30 transitions. [2022-11-25 17:46:20,247 INFO L78 Accepts]: Start accepts. Automaton has 26 states and 30 transitions. Word has length 31 [2022-11-25 17:46:20,247 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-11-25 17:46:20,248 INFO L495 AbstractCegarLoop]: Abstraction has 26 states and 30 transitions. [2022-11-25 17:46:20,248 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 6 states, 6 states have (on average 4.166666666666667) internal successors, (25), 6 states have internal predecessors, (25), 1 states have call successors, (6), 2 states have call predecessors, (6), 2 states have return successors, (6), 1 states have call predecessors, (6), 1 states have call successors, (6) [2022-11-25 17:46:20,248 INFO L276 IsEmpty]: Start isEmpty. Operand 26 states and 30 transitions. [2022-11-25 17:46:20,249 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 34 [2022-11-25 17:46:20,249 INFO L187 NwaCegarLoop]: Found error trace [2022-11-25 17:46:20,250 INFO L195 NwaCegarLoop]: trace histogram [3, 3, 3, 3, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-11-25 17:46:20,268 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_a460571b-f395-45fb-9a27-7e8e20061ee7/bin/uautomizer-ZsLfNo2U6R/mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 (4)] Forceful destruction successful, exit code 0 [2022-11-25 17:46:20,463 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 4 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_a460571b-f395-45fb-9a27-7e8e20061ee7/bin/uautomizer-ZsLfNo2U6R/mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 [2022-11-25 17:46:20,463 INFO L420 AbstractCegarLoop]: === Iteration 4 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-11-25 17:46:20,464 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-11-25 17:46:20,464 INFO L85 PathProgramCache]: Analyzing trace with hash 1821751230, now seen corresponding path program 2 times [2022-11-25 17:46:20,465 INFO L118 FreeRefinementEngine]: Executing refinement strategy WOLF [2022-11-25 17:46:20,465 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [1352624373] [2022-11-25 17:46:20,465 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 [2022-11-25 17:46:20,465 INFO L173 SolverBuilder]: Constructing external solver with command: mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 [2022-11-25 17:46:20,466 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_a460571b-f395-45fb-9a27-7e8e20061ee7/bin/uautomizer-ZsLfNo2U6R/mathsat [2022-11-25 17:46:20,468 INFO L229 MonitoredProcess]: Starting monitored process 5 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_a460571b-f395-45fb-9a27-7e8e20061ee7/bin/uautomizer-ZsLfNo2U6R/mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 (exit command is (exit), workingDir is null) [2022-11-25 17:46:20,469 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_a460571b-f395-45fb-9a27-7e8e20061ee7/bin/uautomizer-ZsLfNo2U6R/mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 (5)] Waiting until timeout for monitored process [2022-11-25 17:46:20,570 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 1 check-sat command(s) [2022-11-25 17:46:20,570 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-11-25 17:46:20,572 INFO L263 TraceCheckSpWp]: Trace formula consists of 47 conjuncts, 3 conjunts are in the unsatisfiable core [2022-11-25 17:46:20,575 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-11-25 17:46:20,712 INFO L134 CoverageAnalysis]: Checked inductivity of 19 backedges. 8 proven. 0 refuted. 0 times theorem prover too weak. 11 trivial. 0 not checked. [2022-11-25 17:46:20,712 INFO L324 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2022-11-25 17:46:20,712 INFO L136 FreeRefinementEngine]: Strategy WOLF found an infeasible trace [2022-11-25 17:46:20,713 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [1352624373] [2022-11-25 17:46:20,713 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleMathsat [1352624373] provided 1 perfect and 0 imperfect interpolant sequences [2022-11-25 17:46:20,713 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-11-25 17:46:20,714 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2022-11-25 17:46:20,714 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1594701085] [2022-11-25 17:46:20,714 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-11-25 17:46:20,715 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 4 states [2022-11-25 17:46:20,715 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WOLF [2022-11-25 17:46:20,716 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2022-11-25 17:46:20,716 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=6, Invalid=6, Unknown=0, NotChecked=0, Total=12 [2022-11-25 17:46:20,716 INFO L87 Difference]: Start difference. First operand 26 states and 30 transitions. Second operand has 4 states, 4 states have (on average 5.25) internal successors, (21), 4 states have internal predecessors, (21), 1 states have call successors, (3), 1 states have call predecessors, (3), 2 states have return successors, (3), 2 states have call predecessors, (3), 1 states have call successors, (3) [2022-11-25 17:46:20,807 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-11-25 17:46:20,808 INFO L93 Difference]: Finished difference Result 45 states and 55 transitions. [2022-11-25 17:46:20,808 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2022-11-25 17:46:20,809 INFO L78 Accepts]: Start accepts. Automaton has has 4 states, 4 states have (on average 5.25) internal successors, (21), 4 states have internal predecessors, (21), 1 states have call successors, (3), 1 states have call predecessors, (3), 2 states have return successors, (3), 2 states have call predecessors, (3), 1 states have call successors, (3) Word has length 33 [2022-11-25 17:46:20,809 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-11-25 17:46:20,810 INFO L225 Difference]: With dead ends: 45 [2022-11-25 17:46:20,810 INFO L226 Difference]: Without dead ends: 28 [2022-11-25 17:46:20,811 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 32 GetRequests, 30 SyntacticMatches, 0 SemanticMatches, 2 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=6, Invalid=6, Unknown=0, NotChecked=0, Total=12 [2022-11-25 17:46:20,812 INFO L413 NwaCegarLoop]: 19 mSDtfsCounter, 11 mSDsluCounter, 9 mSDsCounter, 0 mSdLazyCounter, 25 mSolverCounterSat, 0 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 11 SdHoareTripleChecker+Valid, 28 SdHoareTripleChecker+Invalid, 25 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 0 IncrementalHoareTripleChecker+Valid, 25 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2022-11-25 17:46:20,813 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [11 Valid, 28 Invalid, 25 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [0 Valid, 25 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2022-11-25 17:46:20,814 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 28 states. [2022-11-25 17:46:20,818 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 28 to 27. [2022-11-25 17:46:20,818 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 27 states, 22 states have (on average 1.1363636363636365) internal successors, (25), 22 states have internal predecessors, (25), 3 states have call successors, (3), 1 states have call predecessors, (3), 1 states have return successors, (3), 3 states have call predecessors, (3), 3 states have call successors, (3) [2022-11-25 17:46:20,819 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 27 states to 27 states and 31 transitions. [2022-11-25 17:46:20,820 INFO L78 Accepts]: Start accepts. Automaton has 27 states and 31 transitions. Word has length 33 [2022-11-25 17:46:20,820 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-11-25 17:46:20,820 INFO L495 AbstractCegarLoop]: Abstraction has 27 states and 31 transitions. [2022-11-25 17:46:20,821 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 4 states, 4 states have (on average 5.25) internal successors, (21), 4 states have internal predecessors, (21), 1 states have call successors, (3), 1 states have call predecessors, (3), 2 states have return successors, (3), 2 states have call predecessors, (3), 1 states have call successors, (3) [2022-11-25 17:46:20,821 INFO L276 IsEmpty]: Start isEmpty. Operand 27 states and 31 transitions. [2022-11-25 17:46:20,829 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 40 [2022-11-25 17:46:20,829 INFO L187 NwaCegarLoop]: Found error trace [2022-11-25 17:46:20,830 INFO L195 NwaCegarLoop]: trace histogram [3, 3, 3, 3, 3, 3, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-11-25 17:46:20,848 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_a460571b-f395-45fb-9a27-7e8e20061ee7/bin/uautomizer-ZsLfNo2U6R/mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 (5)] Forceful destruction successful, exit code 0 [2022-11-25 17:46:21,042 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 5 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_a460571b-f395-45fb-9a27-7e8e20061ee7/bin/uautomizer-ZsLfNo2U6R/mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 [2022-11-25 17:46:21,042 INFO L420 AbstractCegarLoop]: === Iteration 5 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-11-25 17:46:21,043 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-11-25 17:46:21,043 INFO L85 PathProgramCache]: Analyzing trace with hash 533240604, now seen corresponding path program 1 times [2022-11-25 17:46:21,044 INFO L118 FreeRefinementEngine]: Executing refinement strategy WOLF [2022-11-25 17:46:21,044 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [1535341009] [2022-11-25 17:46:21,044 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-25 17:46:21,044 INFO L173 SolverBuilder]: Constructing external solver with command: mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 [2022-11-25 17:46:21,044 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_a460571b-f395-45fb-9a27-7e8e20061ee7/bin/uautomizer-ZsLfNo2U6R/mathsat [2022-11-25 17:46:21,046 INFO L229 MonitoredProcess]: Starting monitored process 6 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_a460571b-f395-45fb-9a27-7e8e20061ee7/bin/uautomizer-ZsLfNo2U6R/mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 (exit command is (exit), workingDir is null) [2022-11-25 17:46:21,050 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_a460571b-f395-45fb-9a27-7e8e20061ee7/bin/uautomizer-ZsLfNo2U6R/mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 (6)] Waiting until timeout for monitored process [2022-11-25 17:46:21,189 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-25 17:46:21,193 INFO L263 TraceCheckSpWp]: Trace formula consists of 103 conjuncts, 7 conjunts are in the unsatisfiable core [2022-11-25 17:46:21,195 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-11-25 17:46:21,411 INFO L134 CoverageAnalysis]: Checked inductivity of 34 backedges. 18 proven. 4 refuted. 0 times theorem prover too weak. 12 trivial. 0 not checked. [2022-11-25 17:46:21,411 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-11-25 17:46:21,713 INFO L134 CoverageAnalysis]: Checked inductivity of 34 backedges. 0 proven. 4 refuted. 0 times theorem prover too weak. 30 trivial. 0 not checked. [2022-11-25 17:46:21,713 INFO L136 FreeRefinementEngine]: Strategy WOLF found an infeasible trace [2022-11-25 17:46:21,714 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [1535341009] [2022-11-25 17:46:21,714 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleMathsat [1535341009] provided 0 perfect and 2 imperfect interpolant sequences [2022-11-25 17:46:21,714 INFO L184 FreeRefinementEngine]: Found 0 perfect and 2 imperfect interpolant sequences. [2022-11-25 17:46:21,714 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [7, 7] total 12 [2022-11-25 17:46:21,714 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1943072614] [2022-11-25 17:46:21,714 INFO L85 oduleStraightlineAll]: Using 2 imperfect interpolants to construct interpolant automaton [2022-11-25 17:46:21,715 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 12 states [2022-11-25 17:46:21,715 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WOLF [2022-11-25 17:46:21,716 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 12 interpolants. [2022-11-25 17:46:21,716 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=46, Invalid=86, Unknown=0, NotChecked=0, Total=132 [2022-11-25 17:46:21,716 INFO L87 Difference]: Start difference. First operand 27 states and 31 transitions. Second operand has 12 states, 12 states have (on average 3.5) internal successors, (42), 12 states have internal predecessors, (42), 3 states have call successors, (6), 3 states have call predecessors, (6), 3 states have return successors, (6), 3 states have call predecessors, (6), 3 states have call successors, (6) [2022-11-25 17:46:22,074 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-11-25 17:46:22,074 INFO L93 Difference]: Finished difference Result 65 states and 75 transitions. [2022-11-25 17:46:22,075 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 11 states. [2022-11-25 17:46:22,075 INFO L78 Accepts]: Start accepts. Automaton has has 12 states, 12 states have (on average 3.5) internal successors, (42), 12 states have internal predecessors, (42), 3 states have call successors, (6), 3 states have call predecessors, (6), 3 states have return successors, (6), 3 states have call predecessors, (6), 3 states have call successors, (6) Word has length 39 [2022-11-25 17:46:22,076 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-11-25 17:46:22,076 INFO L225 Difference]: With dead ends: 65 [2022-11-25 17:46:22,077 INFO L226 Difference]: Without dead ends: 52 [2022-11-25 17:46:22,077 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 80 GetRequests, 66 SyntacticMatches, 0 SemanticMatches, 14 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 15 ImplicationChecksByTransitivity, 0.3s TimeCoverageRelationStatistics Valid=86, Invalid=154, Unknown=0, NotChecked=0, Total=240 [2022-11-25 17:46:22,078 INFO L413 NwaCegarLoop]: 18 mSDtfsCounter, 56 mSDsluCounter, 44 mSDsCounter, 0 mSdLazyCounter, 133 mSolverCounterSat, 8 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.2s Time, 0 mProtectedPredicate, 0 mProtectedAction, 56 SdHoareTripleChecker+Valid, 62 SdHoareTripleChecker+Invalid, 141 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 8 IncrementalHoareTripleChecker+Valid, 133 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.2s IncrementalHoareTripleChecker+Time [2022-11-25 17:46:22,078 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [56 Valid, 62 Invalid, 141 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [8 Valid, 133 Invalid, 0 Unknown, 0 Unchecked, 0.2s Time] [2022-11-25 17:46:22,079 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 52 states. [2022-11-25 17:46:22,094 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 52 to 28. [2022-11-25 17:46:22,095 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 28 states, 23 states have (on average 1.1304347826086956) internal successors, (26), 23 states have internal predecessors, (26), 3 states have call successors, (3), 1 states have call predecessors, (3), 1 states have return successors, (3), 3 states have call predecessors, (3), 3 states have call successors, (3) [2022-11-25 17:46:22,098 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 28 states to 28 states and 32 transitions. [2022-11-25 17:46:22,100 INFO L78 Accepts]: Start accepts. Automaton has 28 states and 32 transitions. Word has length 39 [2022-11-25 17:46:22,101 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-11-25 17:46:22,102 INFO L495 AbstractCegarLoop]: Abstraction has 28 states and 32 transitions. [2022-11-25 17:46:22,102 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 12 states, 12 states have (on average 3.5) internal successors, (42), 12 states have internal predecessors, (42), 3 states have call successors, (6), 3 states have call predecessors, (6), 3 states have return successors, (6), 3 states have call predecessors, (6), 3 states have call successors, (6) [2022-11-25 17:46:22,102 INFO L276 IsEmpty]: Start isEmpty. Operand 28 states and 32 transitions. [2022-11-25 17:46:22,104 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 42 [2022-11-25 17:46:22,107 INFO L187 NwaCegarLoop]: Found error trace [2022-11-25 17:46:22,108 INFO L195 NwaCegarLoop]: trace histogram [3, 3, 3, 3, 3, 3, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-11-25 17:46:22,121 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_a460571b-f395-45fb-9a27-7e8e20061ee7/bin/uautomizer-ZsLfNo2U6R/mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 (6)] Forceful destruction successful, exit code 0 [2022-11-25 17:46:22,321 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 6 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_a460571b-f395-45fb-9a27-7e8e20061ee7/bin/uautomizer-ZsLfNo2U6R/mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 [2022-11-25 17:46:22,321 INFO L420 AbstractCegarLoop]: === Iteration 6 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-11-25 17:46:22,322 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-11-25 17:46:22,322 INFO L85 PathProgramCache]: Analyzing trace with hash 850880602, now seen corresponding path program 1 times [2022-11-25 17:46:22,322 INFO L118 FreeRefinementEngine]: Executing refinement strategy WOLF [2022-11-25 17:46:22,322 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [2134705256] [2022-11-25 17:46:22,322 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-25 17:46:22,323 INFO L173 SolverBuilder]: Constructing external solver with command: mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 [2022-11-25 17:46:22,323 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_a460571b-f395-45fb-9a27-7e8e20061ee7/bin/uautomizer-ZsLfNo2U6R/mathsat [2022-11-25 17:46:22,324 INFO L229 MonitoredProcess]: Starting monitored process 7 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_a460571b-f395-45fb-9a27-7e8e20061ee7/bin/uautomizer-ZsLfNo2U6R/mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 (exit command is (exit), workingDir is null) [2022-11-25 17:46:22,328 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_a460571b-f395-45fb-9a27-7e8e20061ee7/bin/uautomizer-ZsLfNo2U6R/mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 (7)] Waiting until timeout for monitored process [2022-11-25 17:46:22,578 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-25 17:46:22,585 INFO L263 TraceCheckSpWp]: Trace formula consists of 108 conjuncts, 50 conjunts are in the unsatisfiable core [2022-11-25 17:46:22,591 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-11-25 17:46:23,102 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-25 17:46:23,108 INFO L321 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2022-11-25 17:46:23,109 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 2 select indices, 2 select index equivalence classes, 1 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 1 case distinctions, treesize of input 45 treesize of output 25 [2022-11-25 17:46:23,628 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-25 17:46:23,633 INFO L321 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2022-11-25 17:46:23,634 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 2 select indices, 2 select index equivalence classes, 1 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 1 case distinctions, treesize of input 61 treesize of output 36 [2022-11-25 17:46:23,869 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-25 17:46:23,871 INFO L173 IndexEqualityManager]: detected equality via solver [2022-11-25 17:46:23,878 INFO L321 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2022-11-25 17:46:23,878 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 2 select indices, 2 select index equivalence classes, 1 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 1 case distinctions, treesize of input 58 treesize of output 48 [2022-11-25 17:46:24,337 INFO L321 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2022-11-25 17:46:24,338 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 0 stores, 2 select indices, 2 select index equivalence classes, 1 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 1 case distinctions, treesize of input 49 treesize of output 25 [2022-11-25 17:46:24,581 INFO L134 CoverageAnalysis]: Checked inductivity of 35 backedges. 0 proven. 28 refuted. 0 times theorem prover too weak. 7 trivial. 0 not checked. [2022-11-25 17:46:24,581 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-11-25 17:46:29,299 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 111 treesize of output 87 [2022-11-25 17:46:29,324 INFO L321 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2022-11-25 17:46:29,325 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 1 case distinctions, treesize of input 90 treesize of output 66 [2022-11-25 17:46:32,443 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 111 treesize of output 87 [2022-11-25 17:46:32,453 INFO L321 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2022-11-25 17:46:32,454 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 1 case distinctions, treesize of input 90 treesize of output 1 [2022-11-25 17:46:33,324 INFO L134 CoverageAnalysis]: Checked inductivity of 35 backedges. 18 proven. 14 refuted. 0 times theorem prover too weak. 3 trivial. 0 not checked. [2022-11-25 17:46:33,324 INFO L136 FreeRefinementEngine]: Strategy WOLF found an infeasible trace [2022-11-25 17:46:33,325 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [2134705256] [2022-11-25 17:46:33,325 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleMathsat [2134705256] provided 0 perfect and 2 imperfect interpolant sequences [2022-11-25 17:46:33,325 INFO L184 FreeRefinementEngine]: Found 0 perfect and 2 imperfect interpolant sequences. [2022-11-25 17:46:33,325 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [21, 23] total 41 [2022-11-25 17:46:33,326 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1951219503] [2022-11-25 17:46:33,326 INFO L85 oduleStraightlineAll]: Using 2 imperfect interpolants to construct interpolant automaton [2022-11-25 17:46:33,327 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 41 states [2022-11-25 17:46:33,327 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WOLF [2022-11-25 17:46:33,328 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 41 interpolants. [2022-11-25 17:46:33,329 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=185, Invalid=1455, Unknown=0, NotChecked=0, Total=1640 [2022-11-25 17:46:33,329 INFO L87 Difference]: Start difference. First operand 28 states and 32 transitions. Second operand has 41 states, 35 states have (on average 1.7142857142857142) internal successors, (60), 34 states have internal predecessors, (60), 6 states have call successors, (6), 2 states have call predecessors, (6), 4 states have return successors, (6), 6 states have call predecessors, (6), 6 states have call successors, (6) [2022-11-25 17:46:40,881 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-11-25 17:46:40,882 INFO L93 Difference]: Finished difference Result 84 states and 102 transitions. [2022-11-25 17:46:40,883 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 27 states. [2022-11-25 17:46:40,883 INFO L78 Accepts]: Start accepts. Automaton has has 41 states, 35 states have (on average 1.7142857142857142) internal successors, (60), 34 states have internal predecessors, (60), 6 states have call successors, (6), 2 states have call predecessors, (6), 4 states have return successors, (6), 6 states have call predecessors, (6), 6 states have call successors, (6) Word has length 41 [2022-11-25 17:46:40,883 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-11-25 17:46:40,886 INFO L225 Difference]: With dead ends: 84 [2022-11-25 17:46:40,887 INFO L226 Difference]: Without dead ends: 80 [2022-11-25 17:46:40,888 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 95 GetRequests, 41 SyntacticMatches, 0 SemanticMatches, 54 ConstructedPredicates, 0 IntricatePredicates, 2 DeprecatedPredicates, 693 ImplicationChecksByTransitivity, 11.8s TimeCoverageRelationStatistics Valid=388, Invalid=2692, Unknown=0, NotChecked=0, Total=3080 [2022-11-25 17:46:40,889 INFO L413 NwaCegarLoop]: 15 mSDtfsCounter, 86 mSDsluCounter, 160 mSDsCounter, 0 mSdLazyCounter, 759 mSolverCounterSat, 68 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 3.6s Time, 0 mProtectedPredicate, 0 mProtectedAction, 86 SdHoareTripleChecker+Valid, 175 SdHoareTripleChecker+Invalid, 827 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 68 IncrementalHoareTripleChecker+Valid, 759 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 3.9s IncrementalHoareTripleChecker+Time [2022-11-25 17:46:40,890 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [86 Valid, 175 Invalid, 827 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [68 Valid, 759 Invalid, 0 Unknown, 0 Unchecked, 3.9s Time] [2022-11-25 17:46:40,891 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 80 states. [2022-11-25 17:46:40,919 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 80 to 61. [2022-11-25 17:46:40,920 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 61 states, 49 states have (on average 1.183673469387755) internal successors, (58), 51 states have internal predecessors, (58), 8 states have call successors, (8), 2 states have call predecessors, (8), 3 states have return successors, (12), 7 states have call predecessors, (12), 8 states have call successors, (12) [2022-11-25 17:46:40,921 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 61 states to 61 states and 78 transitions. [2022-11-25 17:46:40,921 INFO L78 Accepts]: Start accepts. Automaton has 61 states and 78 transitions. Word has length 41 [2022-11-25 17:46:40,922 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-11-25 17:46:40,922 INFO L495 AbstractCegarLoop]: Abstraction has 61 states and 78 transitions. [2022-11-25 17:46:40,922 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 41 states, 35 states have (on average 1.7142857142857142) internal successors, (60), 34 states have internal predecessors, (60), 6 states have call successors, (6), 2 states have call predecessors, (6), 4 states have return successors, (6), 6 states have call predecessors, (6), 6 states have call successors, (6) [2022-11-25 17:46:40,922 INFO L276 IsEmpty]: Start isEmpty. Operand 61 states and 78 transitions. [2022-11-25 17:46:40,924 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 44 [2022-11-25 17:46:40,924 INFO L187 NwaCegarLoop]: Found error trace [2022-11-25 17:46:40,924 INFO L195 NwaCegarLoop]: trace histogram [4, 4, 3, 3, 3, 3, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-11-25 17:46:40,947 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_a460571b-f395-45fb-9a27-7e8e20061ee7/bin/uautomizer-ZsLfNo2U6R/mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 (7)] Forceful destruction successful, exit code 0 [2022-11-25 17:46:41,140 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 7 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_a460571b-f395-45fb-9a27-7e8e20061ee7/bin/uautomizer-ZsLfNo2U6R/mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 [2022-11-25 17:46:41,140 INFO L420 AbstractCegarLoop]: === Iteration 7 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-11-25 17:46:41,141 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-11-25 17:46:41,141 INFO L85 PathProgramCache]: Analyzing trace with hash 88846840, now seen corresponding path program 2 times [2022-11-25 17:46:41,141 INFO L118 FreeRefinementEngine]: Executing refinement strategy WOLF [2022-11-25 17:46:41,141 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [1235867576] [2022-11-25 17:46:41,142 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 [2022-11-25 17:46:41,142 INFO L173 SolverBuilder]: Constructing external solver with command: mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 [2022-11-25 17:46:41,142 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_a460571b-f395-45fb-9a27-7e8e20061ee7/bin/uautomizer-ZsLfNo2U6R/mathsat [2022-11-25 17:46:41,148 INFO L229 MonitoredProcess]: Starting monitored process 8 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_a460571b-f395-45fb-9a27-7e8e20061ee7/bin/uautomizer-ZsLfNo2U6R/mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 (exit command is (exit), workingDir is null) [2022-11-25 17:46:41,192 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_a460571b-f395-45fb-9a27-7e8e20061ee7/bin/uautomizer-ZsLfNo2U6R/mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 (8)] Waiting until timeout for monitored process [2022-11-25 17:46:41,286 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2022-11-25 17:46:41,286 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-11-25 17:46:41,291 INFO L263 TraceCheckSpWp]: Trace formula consists of 111 conjuncts, 10 conjunts are in the unsatisfiable core [2022-11-25 17:46:41,294 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-11-25 17:46:41,554 INFO L134 CoverageAnalysis]: Checked inductivity of 44 backedges. 25 proven. 5 refuted. 0 times theorem prover too weak. 14 trivial. 0 not checked. [2022-11-25 17:46:41,554 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-11-25 17:46:42,247 INFO L134 CoverageAnalysis]: Checked inductivity of 44 backedges. 22 proven. 8 refuted. 0 times theorem prover too weak. 14 trivial. 0 not checked. [2022-11-25 17:46:42,247 INFO L136 FreeRefinementEngine]: Strategy WOLF found an infeasible trace [2022-11-25 17:46:42,248 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [1235867576] [2022-11-25 17:46:42,248 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleMathsat [1235867576] provided 0 perfect and 2 imperfect interpolant sequences [2022-11-25 17:46:42,248 INFO L184 FreeRefinementEngine]: Found 0 perfect and 2 imperfect interpolant sequences. [2022-11-25 17:46:42,248 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [8, 11] total 17 [2022-11-25 17:46:42,248 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1817661859] [2022-11-25 17:46:42,248 INFO L85 oduleStraightlineAll]: Using 2 imperfect interpolants to construct interpolant automaton [2022-11-25 17:46:42,249 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 17 states [2022-11-25 17:46:42,249 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WOLF [2022-11-25 17:46:42,250 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 17 interpolants. [2022-11-25 17:46:42,250 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=63, Invalid=209, Unknown=0, NotChecked=0, Total=272 [2022-11-25 17:46:42,252 INFO L87 Difference]: Start difference. First operand 61 states and 78 transitions. Second operand has 17 states, 17 states have (on average 3.3529411764705883) internal successors, (57), 17 states have internal predecessors, (57), 2 states have call successors, (6), 2 states have call predecessors, (6), 4 states have return successors, (6), 3 states have call predecessors, (6), 2 states have call successors, (6) [2022-11-25 17:46:43,153 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-11-25 17:46:43,153 INFO L93 Difference]: Finished difference Result 104 states and 129 transitions. [2022-11-25 17:46:43,154 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 17 states. [2022-11-25 17:46:43,154 INFO L78 Accepts]: Start accepts. Automaton has has 17 states, 17 states have (on average 3.3529411764705883) internal successors, (57), 17 states have internal predecessors, (57), 2 states have call successors, (6), 2 states have call predecessors, (6), 4 states have return successors, (6), 3 states have call predecessors, (6), 2 states have call successors, (6) Word has length 43 [2022-11-25 17:46:43,155 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-11-25 17:46:43,155 INFO L225 Difference]: With dead ends: 104 [2022-11-25 17:46:43,156 INFO L226 Difference]: Without dead ends: 78 [2022-11-25 17:46:43,156 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 87 GetRequests, 69 SyntacticMatches, 0 SemanticMatches, 18 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 56 ImplicationChecksByTransitivity, 0.7s TimeCoverageRelationStatistics Valid=83, Invalid=297, Unknown=0, NotChecked=0, Total=380 [2022-11-25 17:46:43,157 INFO L413 NwaCegarLoop]: 35 mSDtfsCounter, 44 mSDsluCounter, 122 mSDsCounter, 0 mSdLazyCounter, 312 mSolverCounterSat, 19 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.6s Time, 0 mProtectedPredicate, 0 mProtectedAction, 44 SdHoareTripleChecker+Valid, 157 SdHoareTripleChecker+Invalid, 331 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 19 IncrementalHoareTripleChecker+Valid, 312 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.7s IncrementalHoareTripleChecker+Time [2022-11-25 17:46:43,158 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [44 Valid, 157 Invalid, 331 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [19 Valid, 312 Invalid, 0 Unknown, 0 Unchecked, 0.7s Time] [2022-11-25 17:46:43,159 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 78 states. [2022-11-25 17:46:43,171 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 78 to 50. [2022-11-25 17:46:43,172 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 50 states, 41 states have (on average 1.1219512195121952) internal successors, (46), 42 states have internal predecessors, (46), 6 states have call successors, (6), 2 states have call predecessors, (6), 2 states have return successors, (6), 5 states have call predecessors, (6), 6 states have call successors, (6) [2022-11-25 17:46:43,173 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 50 states to 50 states and 58 transitions. [2022-11-25 17:46:43,182 INFO L78 Accepts]: Start accepts. Automaton has 50 states and 58 transitions. Word has length 43 [2022-11-25 17:46:43,182 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-11-25 17:46:43,182 INFO L495 AbstractCegarLoop]: Abstraction has 50 states and 58 transitions. [2022-11-25 17:46:43,183 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 17 states, 17 states have (on average 3.3529411764705883) internal successors, (57), 17 states have internal predecessors, (57), 2 states have call successors, (6), 2 states have call predecessors, (6), 4 states have return successors, (6), 3 states have call predecessors, (6), 2 states have call successors, (6) [2022-11-25 17:46:43,183 INFO L276 IsEmpty]: Start isEmpty. Operand 50 states and 58 transitions. [2022-11-25 17:46:43,184 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 44 [2022-11-25 17:46:43,184 INFO L187 NwaCegarLoop]: Found error trace [2022-11-25 17:46:43,184 INFO L195 NwaCegarLoop]: trace histogram [3, 3, 3, 3, 3, 3, 3, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-11-25 17:46:43,202 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_a460571b-f395-45fb-9a27-7e8e20061ee7/bin/uautomizer-ZsLfNo2U6R/mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 (8)] Forceful destruction successful, exit code 0 [2022-11-25 17:46:43,397 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 8 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_a460571b-f395-45fb-9a27-7e8e20061ee7/bin/uautomizer-ZsLfNo2U6R/mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 [2022-11-25 17:46:43,397 INFO L420 AbstractCegarLoop]: === Iteration 8 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-11-25 17:46:43,398 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-11-25 17:46:43,398 INFO L85 PathProgramCache]: Analyzing trace with hash 1417469948, now seen corresponding path program 3 times [2022-11-25 17:46:43,400 INFO L118 FreeRefinementEngine]: Executing refinement strategy WOLF [2022-11-25 17:46:43,400 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [1557223375] [2022-11-25 17:46:43,400 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 [2022-11-25 17:46:43,400 INFO L173 SolverBuilder]: Constructing external solver with command: mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 [2022-11-25 17:46:43,401 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_a460571b-f395-45fb-9a27-7e8e20061ee7/bin/uautomizer-ZsLfNo2U6R/mathsat [2022-11-25 17:46:43,404 INFO L229 MonitoredProcess]: Starting monitored process 9 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_a460571b-f395-45fb-9a27-7e8e20061ee7/bin/uautomizer-ZsLfNo2U6R/mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 (exit command is (exit), workingDir is null) [2022-11-25 17:46:43,438 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_a460571b-f395-45fb-9a27-7e8e20061ee7/bin/uautomizer-ZsLfNo2U6R/mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 (9)] Waiting until timeout for monitored process [2022-11-25 17:46:43,581 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 4 check-sat command(s) [2022-11-25 17:46:43,581 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-11-25 17:46:43,586 INFO L263 TraceCheckSpWp]: Trace formula consists of 95 conjuncts, 8 conjunts are in the unsatisfiable core [2022-11-25 17:46:43,588 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-11-25 17:46:43,761 INFO L134 CoverageAnalysis]: Checked inductivity of 40 backedges. 16 proven. 10 refuted. 0 times theorem prover too weak. 14 trivial. 0 not checked. [2022-11-25 17:46:43,761 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-11-25 17:46:44,077 INFO L134 CoverageAnalysis]: Checked inductivity of 40 backedges. 21 proven. 5 refuted. 0 times theorem prover too weak. 14 trivial. 0 not checked. [2022-11-25 17:46:44,077 INFO L136 FreeRefinementEngine]: Strategy WOLF found an infeasible trace [2022-11-25 17:46:44,077 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [1557223375] [2022-11-25 17:46:44,077 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleMathsat [1557223375] provided 0 perfect and 2 imperfect interpolant sequences [2022-11-25 17:46:44,078 INFO L184 FreeRefinementEngine]: Found 0 perfect and 2 imperfect interpolant sequences. [2022-11-25 17:46:44,078 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [8, 9] total 14 [2022-11-25 17:46:44,078 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [74366711] [2022-11-25 17:46:44,078 INFO L85 oduleStraightlineAll]: Using 2 imperfect interpolants to construct interpolant automaton [2022-11-25 17:46:44,079 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 14 states [2022-11-25 17:46:44,079 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WOLF [2022-11-25 17:46:44,080 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 14 interpolants. [2022-11-25 17:46:44,080 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=47, Invalid=135, Unknown=0, NotChecked=0, Total=182 [2022-11-25 17:46:44,080 INFO L87 Difference]: Start difference. First operand 50 states and 58 transitions. Second operand has 14 states, 14 states have (on average 3.5) internal successors, (49), 14 states have internal predecessors, (49), 1 states have call successors, (6), 2 states have call predecessors, (6), 4 states have return successors, (6), 2 states have call predecessors, (6), 1 states have call successors, (6) [2022-11-25 17:46:44,516 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-11-25 17:46:44,516 INFO L93 Difference]: Finished difference Result 77 states and 90 transitions. [2022-11-25 17:46:44,516 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 12 states. [2022-11-25 17:46:44,517 INFO L78 Accepts]: Start accepts. Automaton has has 14 states, 14 states have (on average 3.5) internal successors, (49), 14 states have internal predecessors, (49), 1 states have call successors, (6), 2 states have call predecessors, (6), 4 states have return successors, (6), 2 states have call predecessors, (6), 1 states have call successors, (6) Word has length 43 [2022-11-25 17:46:44,517 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-11-25 17:46:44,518 INFO L225 Difference]: With dead ends: 77 [2022-11-25 17:46:44,518 INFO L226 Difference]: Without dead ends: 58 [2022-11-25 17:46:44,520 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 87 GetRequests, 72 SyntacticMatches, 0 SemanticMatches, 15 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 30 ImplicationChecksByTransitivity, 0.3s TimeCoverageRelationStatistics Valid=72, Invalid=200, Unknown=0, NotChecked=0, Total=272 [2022-11-25 17:46:44,521 INFO L413 NwaCegarLoop]: 31 mSDtfsCounter, 42 mSDsluCounter, 82 mSDsCounter, 0 mSdLazyCounter, 200 mSolverCounterSat, 17 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.3s Time, 0 mProtectedPredicate, 0 mProtectedAction, 42 SdHoareTripleChecker+Valid, 113 SdHoareTripleChecker+Invalid, 217 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 17 IncrementalHoareTripleChecker+Valid, 200 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.4s IncrementalHoareTripleChecker+Time [2022-11-25 17:46:44,521 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [42 Valid, 113 Invalid, 217 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [17 Valid, 200 Invalid, 0 Unknown, 0 Unchecked, 0.4s Time] [2022-11-25 17:46:44,522 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 58 states. [2022-11-25 17:46:44,533 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 58 to 52. [2022-11-25 17:46:44,534 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 52 states, 43 states have (on average 1.1162790697674418) internal successors, (48), 44 states have internal predecessors, (48), 6 states have call successors, (6), 2 states have call predecessors, (6), 2 states have return successors, (6), 5 states have call predecessors, (6), 6 states have call successors, (6) [2022-11-25 17:46:44,535 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 52 states to 52 states and 60 transitions. [2022-11-25 17:46:44,535 INFO L78 Accepts]: Start accepts. Automaton has 52 states and 60 transitions. Word has length 43 [2022-11-25 17:46:44,535 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-11-25 17:46:44,536 INFO L495 AbstractCegarLoop]: Abstraction has 52 states and 60 transitions. [2022-11-25 17:46:44,536 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 14 states, 14 states have (on average 3.5) internal successors, (49), 14 states have internal predecessors, (49), 1 states have call successors, (6), 2 states have call predecessors, (6), 4 states have return successors, (6), 2 states have call predecessors, (6), 1 states have call successors, (6) [2022-11-25 17:46:44,536 INFO L276 IsEmpty]: Start isEmpty. Operand 52 states and 60 transitions. [2022-11-25 17:46:44,537 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 46 [2022-11-25 17:46:44,537 INFO L187 NwaCegarLoop]: Found error trace [2022-11-25 17:46:44,538 INFO L195 NwaCegarLoop]: trace histogram [3, 3, 3, 3, 3, 3, 3, 3, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-11-25 17:46:44,555 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_a460571b-f395-45fb-9a27-7e8e20061ee7/bin/uautomizer-ZsLfNo2U6R/mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 (9)] Forceful destruction successful, exit code 0 [2022-11-25 17:46:44,751 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 9 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_a460571b-f395-45fb-9a27-7e8e20061ee7/bin/uautomizer-ZsLfNo2U6R/mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 [2022-11-25 17:46:44,752 INFO L420 AbstractCegarLoop]: === Iteration 9 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-11-25 17:46:44,752 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-11-25 17:46:44,752 INFO L85 PathProgramCache]: Analyzing trace with hash 2102516822, now seen corresponding path program 4 times [2022-11-25 17:46:44,752 INFO L118 FreeRefinementEngine]: Executing refinement strategy WOLF [2022-11-25 17:46:44,752 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [1547709222] [2022-11-25 17:46:44,753 INFO L93 rtionOrderModulation]: Changing assertion order to TERMS_WITH_SMALL_CONSTANTS_FIRST [2022-11-25 17:46:44,753 INFO L173 SolverBuilder]: Constructing external solver with command: mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 [2022-11-25 17:46:44,753 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_a460571b-f395-45fb-9a27-7e8e20061ee7/bin/uautomizer-ZsLfNo2U6R/mathsat [2022-11-25 17:46:44,754 INFO L229 MonitoredProcess]: Starting monitored process 10 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_a460571b-f395-45fb-9a27-7e8e20061ee7/bin/uautomizer-ZsLfNo2U6R/mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 (exit command is (exit), workingDir is null) [2022-11-25 17:46:44,755 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_a460571b-f395-45fb-9a27-7e8e20061ee7/bin/uautomizer-ZsLfNo2U6R/mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 (10)] Waiting until timeout for monitored process [2022-11-25 17:46:44,915 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2022-11-25 17:46:44,915 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-11-25 17:46:44,923 INFO L263 TraceCheckSpWp]: Trace formula consists of 118 conjuncts, 8 conjunts are in the unsatisfiable core [2022-11-25 17:46:44,925 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-11-25 17:46:45,172 INFO L134 CoverageAnalysis]: Checked inductivity of 43 backedges. 24 proven. 5 refuted. 0 times theorem prover too weak. 14 trivial. 0 not checked. [2022-11-25 17:46:45,172 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-11-25 17:46:45,526 INFO L134 CoverageAnalysis]: Checked inductivity of 43 backedges. 6 proven. 5 refuted. 0 times theorem prover too weak. 32 trivial. 0 not checked. [2022-11-25 17:46:45,526 INFO L136 FreeRefinementEngine]: Strategy WOLF found an infeasible trace [2022-11-25 17:46:45,526 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [1547709222] [2022-11-25 17:46:45,526 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleMathsat [1547709222] provided 0 perfect and 2 imperfect interpolant sequences [2022-11-25 17:46:45,526 INFO L184 FreeRefinementEngine]: Found 0 perfect and 2 imperfect interpolant sequences. [2022-11-25 17:46:45,526 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [8, 8] total 14 [2022-11-25 17:46:45,527 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [784324773] [2022-11-25 17:46:45,527 INFO L85 oduleStraightlineAll]: Using 2 imperfect interpolants to construct interpolant automaton [2022-11-25 17:46:45,527 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 14 states [2022-11-25 17:46:45,527 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WOLF [2022-11-25 17:46:45,528 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 14 interpolants. [2022-11-25 17:46:45,528 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=51, Invalid=131, Unknown=0, NotChecked=0, Total=182 [2022-11-25 17:46:45,529 INFO L87 Difference]: Start difference. First operand 52 states and 60 transitions. Second operand has 14 states, 14 states have (on average 3.5) internal successors, (49), 14 states have internal predecessors, (49), 3 states have call successors, (6), 3 states have call predecessors, (6), 3 states have return successors, (6), 3 states have call predecessors, (6), 3 states have call successors, (6) [2022-11-25 17:46:45,960 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-11-25 17:46:45,961 INFO L93 Difference]: Finished difference Result 64 states and 70 transitions. [2022-11-25 17:46:45,962 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 12 states. [2022-11-25 17:46:45,962 INFO L78 Accepts]: Start accepts. Automaton has has 14 states, 14 states have (on average 3.5) internal successors, (49), 14 states have internal predecessors, (49), 3 states have call successors, (6), 3 states have call predecessors, (6), 3 states have return successors, (6), 3 states have call predecessors, (6), 3 states have call successors, (6) Word has length 45 [2022-11-25 17:46:45,962 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-11-25 17:46:45,963 INFO L225 Difference]: With dead ends: 64 [2022-11-25 17:46:45,963 INFO L226 Difference]: Without dead ends: 33 [2022-11-25 17:46:45,963 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 91 GetRequests, 76 SyntacticMatches, 0 SemanticMatches, 15 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 24 ImplicationChecksByTransitivity, 0.4s TimeCoverageRelationStatistics Valid=82, Invalid=190, Unknown=0, NotChecked=0, Total=272 [2022-11-25 17:46:45,964 INFO L413 NwaCegarLoop]: 19 mSDtfsCounter, 11 mSDsluCounter, 99 mSDsCounter, 0 mSdLazyCounter, 166 mSolverCounterSat, 12 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.3s Time, 0 mProtectedPredicate, 0 mProtectedAction, 12 SdHoareTripleChecker+Valid, 118 SdHoareTripleChecker+Invalid, 178 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 12 IncrementalHoareTripleChecker+Valid, 166 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.4s IncrementalHoareTripleChecker+Time [2022-11-25 17:46:45,964 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [12 Valid, 118 Invalid, 178 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [12 Valid, 166 Invalid, 0 Unknown, 0 Unchecked, 0.4s Time] [2022-11-25 17:46:45,965 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 33 states. [2022-11-25 17:46:45,970 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 33 to 32. [2022-11-25 17:46:45,977 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 32 states, 27 states have (on average 1.1111111111111112) internal successors, (30), 27 states have internal predecessors, (30), 3 states have call successors, (3), 1 states have call predecessors, (3), 1 states have return successors, (3), 3 states have call predecessors, (3), 3 states have call successors, (3) [2022-11-25 17:46:45,977 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 32 states to 32 states and 36 transitions. [2022-11-25 17:46:45,981 INFO L78 Accepts]: Start accepts. Automaton has 32 states and 36 transitions. Word has length 45 [2022-11-25 17:46:45,981 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-11-25 17:46:45,981 INFO L495 AbstractCegarLoop]: Abstraction has 32 states and 36 transitions. [2022-11-25 17:46:45,982 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 14 states, 14 states have (on average 3.5) internal successors, (49), 14 states have internal predecessors, (49), 3 states have call successors, (6), 3 states have call predecessors, (6), 3 states have return successors, (6), 3 states have call predecessors, (6), 3 states have call successors, (6) [2022-11-25 17:46:45,982 INFO L276 IsEmpty]: Start isEmpty. Operand 32 states and 36 transitions. [2022-11-25 17:46:45,983 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 50 [2022-11-25 17:46:45,988 INFO L187 NwaCegarLoop]: Found error trace [2022-11-25 17:46:45,988 INFO L195 NwaCegarLoop]: trace histogram [6, 6, 3, 3, 3, 3, 3, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-11-25 17:46:46,007 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_a460571b-f395-45fb-9a27-7e8e20061ee7/bin/uautomizer-ZsLfNo2U6R/mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 (10)] Forceful destruction successful, exit code 0 [2022-11-25 17:46:46,207 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 10 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_a460571b-f395-45fb-9a27-7e8e20061ee7/bin/uautomizer-ZsLfNo2U6R/mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 [2022-11-25 17:46:46,207 INFO L420 AbstractCegarLoop]: === Iteration 10 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-11-25 17:46:46,208 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-11-25 17:46:46,208 INFO L85 PathProgramCache]: Analyzing trace with hash -457868326, now seen corresponding path program 5 times [2022-11-25 17:46:46,208 INFO L118 FreeRefinementEngine]: Executing refinement strategy WOLF [2022-11-25 17:46:46,208 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [660265808] [2022-11-25 17:46:46,208 INFO L93 rtionOrderModulation]: Changing assertion order to INSIDE_LOOP_FIRST1 [2022-11-25 17:46:46,208 INFO L173 SolverBuilder]: Constructing external solver with command: mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 [2022-11-25 17:46:46,209 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_a460571b-f395-45fb-9a27-7e8e20061ee7/bin/uautomizer-ZsLfNo2U6R/mathsat [2022-11-25 17:46:46,210 INFO L229 MonitoredProcess]: Starting monitored process 11 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_a460571b-f395-45fb-9a27-7e8e20061ee7/bin/uautomizer-ZsLfNo2U6R/mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 (exit command is (exit), workingDir is null) [2022-11-25 17:46:46,215 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_a460571b-f395-45fb-9a27-7e8e20061ee7/bin/uautomizer-ZsLfNo2U6R/mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 (11)] Waiting until timeout for monitored process [2022-11-25 17:46:46,341 INFO L228 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 6 check-sat command(s) [2022-11-25 17:46:46,341 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-11-25 17:46:46,347 INFO L263 TraceCheckSpWp]: Trace formula consists of 77 conjuncts, 11 conjunts are in the unsatisfiable core [2022-11-25 17:46:46,349 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-11-25 17:46:46,578 INFO L134 CoverageAnalysis]: Checked inductivity of 73 backedges. 41 proven. 19 refuted. 0 times theorem prover too weak. 13 trivial. 0 not checked. [2022-11-25 17:46:46,579 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-11-25 17:46:47,005 INFO L134 CoverageAnalysis]: Checked inductivity of 73 backedges. 20 proven. 17 refuted. 0 times theorem prover too weak. 36 trivial. 0 not checked. [2022-11-25 17:46:47,005 INFO L136 FreeRefinementEngine]: Strategy WOLF found an infeasible trace [2022-11-25 17:46:47,005 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [660265808] [2022-11-25 17:46:47,006 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleMathsat [660265808] provided 0 perfect and 2 imperfect interpolant sequences [2022-11-25 17:46:47,006 INFO L184 FreeRefinementEngine]: Found 0 perfect and 2 imperfect interpolant sequences. [2022-11-25 17:46:47,006 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [12, 8] total 18 [2022-11-25 17:46:47,006 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [680718015] [2022-11-25 17:46:47,006 INFO L85 oduleStraightlineAll]: Using 2 imperfect interpolants to construct interpolant automaton [2022-11-25 17:46:47,007 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 18 states [2022-11-25 17:46:47,007 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WOLF [2022-11-25 17:46:47,007 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 18 interpolants. [2022-11-25 17:46:47,008 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=80, Invalid=226, Unknown=0, NotChecked=0, Total=306 [2022-11-25 17:46:47,008 INFO L87 Difference]: Start difference. First operand 32 states and 36 transitions. Second operand has 18 states, 18 states have (on average 3.111111111111111) internal successors, (56), 18 states have internal predecessors, (56), 3 states have call successors, (5), 3 states have call predecessors, (5), 5 states have return successors, (6), 5 states have call predecessors, (6), 3 states have call successors, (6) [2022-11-25 17:46:47,858 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-11-25 17:46:47,858 INFO L93 Difference]: Finished difference Result 101 states and 118 transitions. [2022-11-25 17:46:47,859 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 23 states. [2022-11-25 17:46:47,859 INFO L78 Accepts]: Start accepts. Automaton has has 18 states, 18 states have (on average 3.111111111111111) internal successors, (56), 18 states have internal predecessors, (56), 3 states have call successors, (5), 3 states have call predecessors, (5), 5 states have return successors, (6), 5 states have call predecessors, (6), 3 states have call successors, (6) Word has length 49 [2022-11-25 17:46:47,860 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-11-25 17:46:47,861 INFO L225 Difference]: With dead ends: 101 [2022-11-25 17:46:47,862 INFO L226 Difference]: Without dead ends: 82 [2022-11-25 17:46:47,862 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 111 GetRequests, 81 SyntacticMatches, 0 SemanticMatches, 30 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 207 ImplicationChecksByTransitivity, 0.8s TimeCoverageRelationStatistics Valid=229, Invalid=763, Unknown=0, NotChecked=0, Total=992 [2022-11-25 17:46:47,864 INFO L413 NwaCegarLoop]: 27 mSDtfsCounter, 131 mSDsluCounter, 109 mSDsCounter, 0 mSdLazyCounter, 222 mSolverCounterSat, 45 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.4s Time, 0 mProtectedPredicate, 0 mProtectedAction, 133 SdHoareTripleChecker+Valid, 136 SdHoareTripleChecker+Invalid, 267 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 45 IncrementalHoareTripleChecker+Valid, 222 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.4s IncrementalHoareTripleChecker+Time [2022-11-25 17:46:47,865 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [133 Valid, 136 Invalid, 267 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [45 Valid, 222 Invalid, 0 Unknown, 0 Unchecked, 0.4s Time] [2022-11-25 17:46:47,867 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 82 states. [2022-11-25 17:46:47,884 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 82 to 58. [2022-11-25 17:46:47,885 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 58 states, 49 states have (on average 1.1020408163265305) internal successors, (54), 50 states have internal predecessors, (54), 5 states have call successors, (5), 2 states have call predecessors, (5), 3 states have return successors, (8), 5 states have call predecessors, (8), 5 states have call successors, (8) [2022-11-25 17:46:47,885 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 58 states to 58 states and 67 transitions. [2022-11-25 17:46:47,886 INFO L78 Accepts]: Start accepts. Automaton has 58 states and 67 transitions. Word has length 49 [2022-11-25 17:46:47,886 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-11-25 17:46:47,886 INFO L495 AbstractCegarLoop]: Abstraction has 58 states and 67 transitions. [2022-11-25 17:46:47,886 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 18 states, 18 states have (on average 3.111111111111111) internal successors, (56), 18 states have internal predecessors, (56), 3 states have call successors, (5), 3 states have call predecessors, (5), 5 states have return successors, (6), 5 states have call predecessors, (6), 3 states have call successors, (6) [2022-11-25 17:46:47,886 INFO L276 IsEmpty]: Start isEmpty. Operand 58 states and 67 transitions. [2022-11-25 17:46:47,887 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 52 [2022-11-25 17:46:47,887 INFO L187 NwaCegarLoop]: Found error trace [2022-11-25 17:46:47,888 INFO L195 NwaCegarLoop]: trace histogram [6, 6, 3, 3, 3, 3, 3, 3, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-11-25 17:46:47,899 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_a460571b-f395-45fb-9a27-7e8e20061ee7/bin/uautomizer-ZsLfNo2U6R/mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 (11)] Forceful destruction successful, exit code 0 [2022-11-25 17:46:48,098 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 11 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_a460571b-f395-45fb-9a27-7e8e20061ee7/bin/uautomizer-ZsLfNo2U6R/mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 [2022-11-25 17:46:48,098 INFO L420 AbstractCegarLoop]: === Iteration 11 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-11-25 17:46:48,099 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-11-25 17:46:48,099 INFO L85 PathProgramCache]: Analyzing trace with hash -376141416, now seen corresponding path program 6 times [2022-11-25 17:46:48,099 INFO L118 FreeRefinementEngine]: Executing refinement strategy WOLF [2022-11-25 17:46:48,099 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [1914658917] [2022-11-25 17:46:48,099 INFO L93 rtionOrderModulation]: Changing assertion order to MIX_INSIDE_OUTSIDE [2022-11-25 17:46:48,099 INFO L173 SolverBuilder]: Constructing external solver with command: mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 [2022-11-25 17:46:48,100 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_a460571b-f395-45fb-9a27-7e8e20061ee7/bin/uautomizer-ZsLfNo2U6R/mathsat [2022-11-25 17:46:48,100 INFO L229 MonitoredProcess]: Starting monitored process 12 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_a460571b-f395-45fb-9a27-7e8e20061ee7/bin/uautomizer-ZsLfNo2U6R/mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 (exit command is (exit), workingDir is null) [2022-11-25 17:46:48,106 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_a460571b-f395-45fb-9a27-7e8e20061ee7/bin/uautomizer-ZsLfNo2U6R/mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 (12)] Waiting until timeout for monitored process [2022-11-25 17:46:48,580 INFO L228 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 7 check-sat command(s) [2022-11-25 17:46:48,580 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-11-25 17:46:48,590 WARN L261 TraceCheckSpWp]: Trace formula consists of 127 conjuncts, 67 conjunts are in the unsatisfiable core [2022-11-25 17:46:48,595 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-11-25 17:46:48,690 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 15 treesize of output 11 [2022-11-25 17:46:49,608 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-25 17:46:49,610 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-25 17:46:49,615 INFO L321 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2022-11-25 17:46:49,615 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 3 select indices, 3 select index equivalence classes, 3 disjoint index pairs (out of 3 index pairs), introduced 3 new quantified variables, introduced 3 case distinctions, treesize of input 54 treesize of output 37 [2022-11-25 17:46:50,392 INFO L173 IndexEqualityManager]: detected equality via solver [2022-11-25 17:46:50,394 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-25 17:46:50,396 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-25 17:46:50,400 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-25 17:46:50,402 INFO L173 IndexEqualityManager]: detected equality via solver [2022-11-25 17:46:50,408 INFO L321 Elim1Store]: treesize reduction 2, result has 33.3 percent of original size [2022-11-25 17:46:50,408 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 4 select indices, 4 select index equivalence classes, 3 disjoint index pairs (out of 6 index pairs), introduced 4 new quantified variables, introduced 6 case distinctions, treesize of input 86 treesize of output 74 [2022-11-25 17:46:50,802 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-25 17:46:50,803 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-25 17:46:50,807 INFO L321 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2022-11-25 17:46:50,807 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 3 select indices, 3 select index equivalence classes, 3 disjoint index pairs (out of 3 index pairs), introduced 3 new quantified variables, introduced 3 case distinctions, treesize of input 79 treesize of output 51 [2022-11-25 17:46:51,071 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-25 17:46:51,072 INFO L173 IndexEqualityManager]: detected equality via solver [2022-11-25 17:46:51,074 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-25 17:46:51,075 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-25 17:46:51,080 INFO L321 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2022-11-25 17:46:51,081 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 3 select indices, 3 select index equivalence classes, 3 disjoint index pairs (out of 3 index pairs), introduced 3 new quantified variables, introduced 3 case distinctions, treesize of input 74 treesize of output 63 [2022-11-25 17:46:52,026 INFO L321 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2022-11-25 17:46:52,027 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 0 stores, 3 select indices, 3 select index equivalence classes, 3 disjoint index pairs (out of 3 index pairs), introduced 3 new quantified variables, introduced 3 case distinctions, treesize of input 70 treesize of output 34 [2022-11-25 17:46:52,363 INFO L134 CoverageAnalysis]: Checked inductivity of 76 backedges. 4 proven. 49 refuted. 0 times theorem prover too weak. 23 trivial. 0 not checked. [2022-11-25 17:46:52,363 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-11-25 17:47:07,778 INFO L134 CoverageAnalysis]: Checked inductivity of 76 backedges. 6 proven. 50 refuted. 0 times theorem prover too weak. 20 trivial. 0 not checked. [2022-11-25 17:47:07,779 INFO L136 FreeRefinementEngine]: Strategy WOLF found an infeasible trace [2022-11-25 17:47:07,779 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [1914658917] [2022-11-25 17:47:07,779 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleMathsat [1914658917] provided 0 perfect and 2 imperfect interpolant sequences [2022-11-25 17:47:07,779 INFO L184 FreeRefinementEngine]: Found 0 perfect and 2 imperfect interpolant sequences. [2022-11-25 17:47:07,779 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [26, 24] total 47 [2022-11-25 17:47:07,780 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1162685293] [2022-11-25 17:47:07,780 INFO L85 oduleStraightlineAll]: Using 2 imperfect interpolants to construct interpolant automaton [2022-11-25 17:47:07,780 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 47 states [2022-11-25 17:47:07,780 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WOLF [2022-11-25 17:47:07,781 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 47 interpolants. [2022-11-25 17:47:07,782 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=177, Invalid=1983, Unknown=2, NotChecked=0, Total=2162 [2022-11-25 17:47:07,782 INFO L87 Difference]: Start difference. First operand 58 states and 67 transitions. Second operand has 47 states, 42 states have (on average 1.4523809523809523) internal successors, (61), 40 states have internal predecessors, (61), 6 states have call successors, (6), 2 states have call predecessors, (6), 2 states have return successors, (6), 6 states have call predecessors, (6), 6 states have call successors, (6) [2022-11-25 17:48:10,330 WARN L233 SmtUtils]: Spent 1.03m on a formula simplification. DAG size of input: 160 DAG size of output: 151 (called from [L 361] de.uni_freiburg.informatik.ultimate.lib.modelcheckerutils.smt.predicates.PredicateUnifier.getOrConstructPredicate) [2022-11-25 17:48:30,557 WARN L233 SmtUtils]: Spent 18.53s on a formula simplification. DAG size of input: 167 DAG size of output: 142 (called from [L 361] de.uni_freiburg.informatik.ultimate.lib.modelcheckerutils.smt.predicates.PredicateUnifier.getOrConstructPredicate) [2022-11-25 17:49:55,478 WARN L233 SmtUtils]: Spent 47.70s on a formula simplification. DAG size of input: 154 DAG size of output: 126 (called from [L 361] de.uni_freiburg.informatik.ultimate.lib.modelcheckerutils.smt.predicates.PredicateUnifier.getOrConstructPredicate) [2022-11-25 17:49:59,270 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 1.65s for a HTC check with result INVALID. Formula has sorts [Array, Bool, BitVec], hasArrays=true, hasNonlinArith=false, quantifiers [] [2022-11-25 17:50:07,967 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.00s for a HTC check with result UNKNOWN. Formula has sorts [Array, Bool, BitVec], hasArrays=true, hasNonlinArith=false, quantifiers [] [2022-11-25 17:50:10,111 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.00s for a HTC check with result UNKNOWN. Formula has sorts [Array, Bool, BitVec], hasArrays=true, hasNonlinArith=false, quantifiers [] [2022-11-25 17:50:12,259 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.01s for a HTC check with result UNKNOWN. Formula has sorts [Array, Bool, BitVec], hasArrays=true, hasNonlinArith=false, quantifiers [] [2022-11-25 17:50:22,424 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.00s for a HTC check with result UNKNOWN. Formula has sorts [Array, Bool, BitVec], hasArrays=true, hasNonlinArith=false, quantifiers [] [2022-11-25 17:50:34,614 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-11-25 17:50:34,614 INFO L93 Difference]: Finished difference Result 160 states and 187 transitions. [2022-11-25 17:50:34,615 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 53 states. [2022-11-25 17:50:34,615 INFO L78 Accepts]: Start accepts. Automaton has has 47 states, 42 states have (on average 1.4523809523809523) internal successors, (61), 40 states have internal predecessors, (61), 6 states have call successors, (6), 2 states have call predecessors, (6), 2 states have return successors, (6), 6 states have call predecessors, (6), 6 states have call successors, (6) Word has length 51 [2022-11-25 17:50:34,616 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-11-25 17:50:34,617 INFO L225 Difference]: With dead ends: 160 [2022-11-25 17:50:34,617 INFO L226 Difference]: Without dead ends: 106 [2022-11-25 17:50:34,619 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 139 GetRequests, 54 SyntacticMatches, 2 SemanticMatches, 83 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1781 ImplicationChecksByTransitivity, 187.0s TimeCoverageRelationStatistics Valid=594, Invalid=6537, Unknown=9, NotChecked=0, Total=7140 [2022-11-25 17:50:34,620 INFO L413 NwaCegarLoop]: 13 mSDtfsCounter, 113 mSDsluCounter, 117 mSDsCounter, 0 mSdLazyCounter, 1398 mSolverCounterSat, 103 mSolverCounterUnsat, 4 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 32.7s Time, 0 mProtectedPredicate, 0 mProtectedAction, 114 SdHoareTripleChecker+Valid, 130 SdHoareTripleChecker+Invalid, 1505 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 103 IncrementalHoareTripleChecker+Valid, 1398 IncrementalHoareTripleChecker+Invalid, 4 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 33.4s IncrementalHoareTripleChecker+Time [2022-11-25 17:50:34,620 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [114 Valid, 130 Invalid, 1505 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [103 Valid, 1398 Invalid, 4 Unknown, 0 Unchecked, 33.4s Time] [2022-11-25 17:50:34,621 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 106 states. [2022-11-25 17:50:34,643 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 106 to 78. [2022-11-25 17:50:34,644 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 78 states, 66 states have (on average 1.0909090909090908) internal successors, (72), 66 states have internal predecessors, (72), 7 states have call successors, (7), 3 states have call predecessors, (7), 4 states have return successors, (10), 8 states have call predecessors, (10), 7 states have call successors, (10) [2022-11-25 17:50:34,645 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 78 states to 78 states and 89 transitions. [2022-11-25 17:50:34,645 INFO L78 Accepts]: Start accepts. Automaton has 78 states and 89 transitions. Word has length 51 [2022-11-25 17:50:34,646 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-11-25 17:50:34,646 INFO L495 AbstractCegarLoop]: Abstraction has 78 states and 89 transitions. [2022-11-25 17:50:34,646 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 47 states, 42 states have (on average 1.4523809523809523) internal successors, (61), 40 states have internal predecessors, (61), 6 states have call successors, (6), 2 states have call predecessors, (6), 2 states have return successors, (6), 6 states have call predecessors, (6), 6 states have call successors, (6) [2022-11-25 17:50:34,646 INFO L276 IsEmpty]: Start isEmpty. Operand 78 states and 89 transitions. [2022-11-25 17:50:34,647 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 56 [2022-11-25 17:50:34,647 INFO L187 NwaCegarLoop]: Found error trace [2022-11-25 17:50:34,647 INFO L195 NwaCegarLoop]: trace histogram [6, 6, 4, 4, 3, 3, 3, 3, 3, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-11-25 17:50:34,658 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_a460571b-f395-45fb-9a27-7e8e20061ee7/bin/uautomizer-ZsLfNo2U6R/mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 (12)] Forceful destruction successful, exit code 0 [2022-11-25 17:50:34,854 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 12 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_a460571b-f395-45fb-9a27-7e8e20061ee7/bin/uautomizer-ZsLfNo2U6R/mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 [2022-11-25 17:50:34,854 INFO L420 AbstractCegarLoop]: === Iteration 12 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-11-25 17:50:34,854 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-11-25 17:50:34,854 INFO L85 PathProgramCache]: Analyzing trace with hash 1911365268, now seen corresponding path program 7 times [2022-11-25 17:50:34,855 INFO L118 FreeRefinementEngine]: Executing refinement strategy WOLF [2022-11-25 17:50:34,855 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [489811216] [2022-11-25 17:50:34,855 INFO L93 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2022-11-25 17:50:34,855 INFO L173 SolverBuilder]: Constructing external solver with command: mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 [2022-11-25 17:50:34,855 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_a460571b-f395-45fb-9a27-7e8e20061ee7/bin/uautomizer-ZsLfNo2U6R/mathsat [2022-11-25 17:50:34,856 INFO L229 MonitoredProcess]: Starting monitored process 13 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_a460571b-f395-45fb-9a27-7e8e20061ee7/bin/uautomizer-ZsLfNo2U6R/mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 (exit command is (exit), workingDir is null) [2022-11-25 17:50:34,857 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_a460571b-f395-45fb-9a27-7e8e20061ee7/bin/uautomizer-ZsLfNo2U6R/mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 (13)] Waiting until timeout for monitored process [2022-11-25 17:50:35,001 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-25 17:50:35,010 INFO L263 TraceCheckSpWp]: Trace formula consists of 137 conjuncts, 11 conjunts are in the unsatisfiable core [2022-11-25 17:50:35,011 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-11-25 17:50:35,373 INFO L134 CoverageAnalysis]: Checked inductivity of 88 backedges. 44 proven. 13 refuted. 0 times theorem prover too weak. 31 trivial. 0 not checked. [2022-11-25 17:50:35,373 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-11-25 17:50:36,144 INFO L134 CoverageAnalysis]: Checked inductivity of 88 backedges. 10 proven. 13 refuted. 0 times theorem prover too weak. 65 trivial. 0 not checked. [2022-11-25 17:50:36,144 INFO L136 FreeRefinementEngine]: Strategy WOLF found an infeasible trace [2022-11-25 17:50:36,144 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [489811216] [2022-11-25 17:50:36,145 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleMathsat [489811216] provided 0 perfect and 2 imperfect interpolant sequences [2022-11-25 17:50:36,145 INFO L184 FreeRefinementEngine]: Found 0 perfect and 2 imperfect interpolant sequences. [2022-11-25 17:50:36,145 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [11, 11] total 20 [2022-11-25 17:50:36,145 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [723082296] [2022-11-25 17:50:36,145 INFO L85 oduleStraightlineAll]: Using 2 imperfect interpolants to construct interpolant automaton [2022-11-25 17:50:36,145 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 20 states [2022-11-25 17:50:36,146 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WOLF [2022-11-25 17:50:36,146 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 20 interpolants. [2022-11-25 17:50:36,146 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=93, Invalid=287, Unknown=0, NotChecked=0, Total=380 [2022-11-25 17:50:36,147 INFO L87 Difference]: Start difference. First operand 78 states and 89 transitions. Second operand has 20 states, 20 states have (on average 2.85) internal successors, (57), 20 states have internal predecessors, (57), 3 states have call successors, (6), 3 states have call predecessors, (6), 3 states have return successors, (6), 3 states have call predecessors, (6), 3 states have call successors, (6) [2022-11-25 17:50:37,307 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-11-25 17:50:37,307 INFO L93 Difference]: Finished difference Result 110 states and 120 transitions. [2022-11-25 17:50:37,309 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 16 states. [2022-11-25 17:50:37,309 INFO L78 Accepts]: Start accepts. Automaton has has 20 states, 20 states have (on average 2.85) internal successors, (57), 20 states have internal predecessors, (57), 3 states have call successors, (6), 3 states have call predecessors, (6), 3 states have return successors, (6), 3 states have call predecessors, (6), 3 states have call successors, (6) Word has length 55 [2022-11-25 17:50:37,309 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-11-25 17:50:37,310 INFO L225 Difference]: With dead ends: 110 [2022-11-25 17:50:37,310 INFO L226 Difference]: Without dead ends: 64 [2022-11-25 17:50:37,311 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 114 GetRequests, 90 SyntacticMatches, 0 SemanticMatches, 24 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 96 ImplicationChecksByTransitivity, 1.2s TimeCoverageRelationStatistics Valid=169, Invalid=481, Unknown=0, NotChecked=0, Total=650 [2022-11-25 17:50:37,311 INFO L413 NwaCegarLoop]: 18 mSDtfsCounter, 39 mSDsluCounter, 101 mSDsCounter, 0 mSdLazyCounter, 300 mSolverCounterSat, 26 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.6s Time, 0 mProtectedPredicate, 0 mProtectedAction, 39 SdHoareTripleChecker+Valid, 119 SdHoareTripleChecker+Invalid, 326 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 26 IncrementalHoareTripleChecker+Valid, 300 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.7s IncrementalHoareTripleChecker+Time [2022-11-25 17:50:37,312 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [39 Valid, 119 Invalid, 326 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [26 Valid, 300 Invalid, 0 Unknown, 0 Unchecked, 0.7s Time] [2022-11-25 17:50:37,312 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 64 states. [2022-11-25 17:50:37,331 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 64 to 63. [2022-11-25 17:50:37,331 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 63 states, 54 states have (on average 1.0925925925925926) internal successors, (59), 54 states have internal predecessors, (59), 5 states have call successors, (5), 2 states have call predecessors, (5), 3 states have return successors, (8), 6 states have call predecessors, (8), 5 states have call successors, (8) [2022-11-25 17:50:37,332 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 63 states to 63 states and 72 transitions. [2022-11-25 17:50:37,332 INFO L78 Accepts]: Start accepts. Automaton has 63 states and 72 transitions. Word has length 55 [2022-11-25 17:50:37,332 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-11-25 17:50:37,332 INFO L495 AbstractCegarLoop]: Abstraction has 63 states and 72 transitions. [2022-11-25 17:50:37,333 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 20 states, 20 states have (on average 2.85) internal successors, (57), 20 states have internal predecessors, (57), 3 states have call successors, (6), 3 states have call predecessors, (6), 3 states have return successors, (6), 3 states have call predecessors, (6), 3 states have call successors, (6) [2022-11-25 17:50:37,333 INFO L276 IsEmpty]: Start isEmpty. Operand 63 states and 72 transitions. [2022-11-25 17:50:37,333 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 56 [2022-11-25 17:50:37,334 INFO L187 NwaCegarLoop]: Found error trace [2022-11-25 17:50:37,334 INFO L195 NwaCegarLoop]: trace histogram [6, 6, 4, 4, 3, 3, 3, 3, 3, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-11-25 17:50:37,348 INFO L552 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_a460571b-f395-45fb-9a27-7e8e20061ee7/bin/uautomizer-ZsLfNo2U6R/mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 (13)] Ended with exit code 0 [2022-11-25 17:50:37,548 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 13 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_a460571b-f395-45fb-9a27-7e8e20061ee7/bin/uautomizer-ZsLfNo2U6R/mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 [2022-11-25 17:50:37,548 INFO L420 AbstractCegarLoop]: === Iteration 13 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-11-25 17:50:37,548 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-11-25 17:50:37,549 INFO L85 PathProgramCache]: Analyzing trace with hash -1407437704, now seen corresponding path program 8 times [2022-11-25 17:50:37,549 INFO L118 FreeRefinementEngine]: Executing refinement strategy WOLF [2022-11-25 17:50:37,549 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [1957264265] [2022-11-25 17:50:37,549 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 [2022-11-25 17:50:37,549 INFO L173 SolverBuilder]: Constructing external solver with command: mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 [2022-11-25 17:50:37,549 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_a460571b-f395-45fb-9a27-7e8e20061ee7/bin/uautomizer-ZsLfNo2U6R/mathsat [2022-11-25 17:50:37,550 INFO L229 MonitoredProcess]: Starting monitored process 14 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_a460571b-f395-45fb-9a27-7e8e20061ee7/bin/uautomizer-ZsLfNo2U6R/mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 (exit command is (exit), workingDir is null) [2022-11-25 17:50:37,566 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_a460571b-f395-45fb-9a27-7e8e20061ee7/bin/uautomizer-ZsLfNo2U6R/mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 (14)] Waiting until timeout for monitored process [2022-11-25 17:50:37,706 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2022-11-25 17:50:37,707 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-11-25 17:50:37,713 INFO L263 TraceCheckSpWp]: Trace formula consists of 137 conjuncts, 13 conjunts are in the unsatisfiable core [2022-11-25 17:50:37,715 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-11-25 17:50:38,002 INFO L134 CoverageAnalysis]: Checked inductivity of 88 backedges. 28 proven. 20 refuted. 0 times theorem prover too weak. 40 trivial. 0 not checked. [2022-11-25 17:50:38,002 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-11-25 17:50:39,036 INFO L134 CoverageAnalysis]: Checked inductivity of 88 backedges. 0 proven. 52 refuted. 0 times theorem prover too weak. 36 trivial. 0 not checked. [2022-11-25 17:50:39,036 INFO L136 FreeRefinementEngine]: Strategy WOLF found an infeasible trace [2022-11-25 17:50:39,036 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [1957264265] [2022-11-25 17:50:39,036 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleMathsat [1957264265] provided 0 perfect and 2 imperfect interpolant sequences [2022-11-25 17:50:39,036 INFO L184 FreeRefinementEngine]: Found 0 perfect and 2 imperfect interpolant sequences. [2022-11-25 17:50:39,037 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [13, 14] total 25 [2022-11-25 17:50:39,037 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [159380422] [2022-11-25 17:50:39,037 INFO L85 oduleStraightlineAll]: Using 2 imperfect interpolants to construct interpolant automaton [2022-11-25 17:50:39,037 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 25 states [2022-11-25 17:50:39,037 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WOLF [2022-11-25 17:50:39,038 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 25 interpolants. [2022-11-25 17:50:39,038 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=139, Invalid=461, Unknown=0, NotChecked=0, Total=600 [2022-11-25 17:50:39,038 INFO L87 Difference]: Start difference. First operand 63 states and 72 transitions. Second operand has 25 states, 24 states have (on average 2.375) internal successors, (57), 25 states have internal predecessors, (57), 3 states have call successors, (6), 3 states have call predecessors, (6), 3 states have return successors, (6), 1 states have call predecessors, (6), 3 states have call successors, (6) [2022-11-25 17:50:39,990 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-11-25 17:50:39,990 INFO L93 Difference]: Finished difference Result 97 states and 113 transitions. [2022-11-25 17:50:39,990 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 20 states. [2022-11-25 17:50:39,991 INFO L78 Accepts]: Start accepts. Automaton has has 25 states, 24 states have (on average 2.375) internal successors, (57), 25 states have internal predecessors, (57), 3 states have call successors, (6), 3 states have call predecessors, (6), 3 states have return successors, (6), 1 states have call predecessors, (6), 3 states have call successors, (6) Word has length 55 [2022-11-25 17:50:39,991 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-11-25 17:50:39,991 INFO L225 Difference]: With dead ends: 97 [2022-11-25 17:50:39,992 INFO L226 Difference]: Without dead ends: 68 [2022-11-25 17:50:39,992 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 113 GetRequests, 85 SyntacticMatches, 0 SemanticMatches, 28 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 175 ImplicationChecksByTransitivity, 1.2s TimeCoverageRelationStatistics Valid=212, Invalid=658, Unknown=0, NotChecked=0, Total=870 [2022-11-25 17:50:39,993 INFO L413 NwaCegarLoop]: 18 mSDtfsCounter, 184 mSDsluCounter, 129 mSDsCounter, 0 mSdLazyCounter, 425 mSolverCounterSat, 48 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.5s Time, 0 mProtectedPredicate, 0 mProtectedAction, 184 SdHoareTripleChecker+Valid, 147 SdHoareTripleChecker+Invalid, 473 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 48 IncrementalHoareTripleChecker+Valid, 425 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.6s IncrementalHoareTripleChecker+Time [2022-11-25 17:50:39,993 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [184 Valid, 147 Invalid, 473 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [48 Valid, 425 Invalid, 0 Unknown, 0 Unchecked, 0.6s Time] [2022-11-25 17:50:39,994 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 68 states. [2022-11-25 17:50:40,005 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 68 to 38. [2022-11-25 17:50:40,005 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 38 states, 33 states have (on average 1.0909090909090908) internal successors, (36), 33 states have internal predecessors, (36), 3 states have call successors, (3), 1 states have call predecessors, (3), 1 states have return successors, (3), 3 states have call predecessors, (3), 3 states have call successors, (3) [2022-11-25 17:50:40,006 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 38 states to 38 states and 42 transitions. [2022-11-25 17:50:40,006 INFO L78 Accepts]: Start accepts. Automaton has 38 states and 42 transitions. Word has length 55 [2022-11-25 17:50:40,006 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-11-25 17:50:40,006 INFO L495 AbstractCegarLoop]: Abstraction has 38 states and 42 transitions. [2022-11-25 17:50:40,006 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 25 states, 24 states have (on average 2.375) internal successors, (57), 25 states have internal predecessors, (57), 3 states have call successors, (6), 3 states have call predecessors, (6), 3 states have return successors, (6), 1 states have call predecessors, (6), 3 states have call successors, (6) [2022-11-25 17:50:40,007 INFO L276 IsEmpty]: Start isEmpty. Operand 38 states and 42 transitions. [2022-11-25 17:50:40,007 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 60 [2022-11-25 17:50:40,007 INFO L187 NwaCegarLoop]: Found error trace [2022-11-25 17:50:40,008 INFO L195 NwaCegarLoop]: trace histogram [9, 9, 4, 4, 3, 3, 3, 3, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-11-25 17:50:40,020 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_a460571b-f395-45fb-9a27-7e8e20061ee7/bin/uautomizer-ZsLfNo2U6R/mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 (14)] Forceful destruction successful, exit code 0 [2022-11-25 17:50:40,220 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 14 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_a460571b-f395-45fb-9a27-7e8e20061ee7/bin/uautomizer-ZsLfNo2U6R/mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 [2022-11-25 17:50:40,220 INFO L420 AbstractCegarLoop]: === Iteration 14 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-11-25 17:50:40,221 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-11-25 17:50:40,221 INFO L85 PathProgramCache]: Analyzing trace with hash -1335258344, now seen corresponding path program 9 times [2022-11-25 17:50:40,221 INFO L118 FreeRefinementEngine]: Executing refinement strategy WOLF [2022-11-25 17:50:40,221 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [730317085] [2022-11-25 17:50:40,221 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 [2022-11-25 17:50:40,221 INFO L173 SolverBuilder]: Constructing external solver with command: mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 [2022-11-25 17:50:40,221 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_a460571b-f395-45fb-9a27-7e8e20061ee7/bin/uautomizer-ZsLfNo2U6R/mathsat [2022-11-25 17:50:40,223 INFO L229 MonitoredProcess]: Starting monitored process 15 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_a460571b-f395-45fb-9a27-7e8e20061ee7/bin/uautomizer-ZsLfNo2U6R/mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 (exit command is (exit), workingDir is null) [2022-11-25 17:50:40,225 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_a460571b-f395-45fb-9a27-7e8e20061ee7/bin/uautomizer-ZsLfNo2U6R/mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 (15)] Waiting until timeout for monitored process [2022-11-25 17:50:40,346 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 4 check-sat command(s) [2022-11-25 17:50:40,347 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-11-25 17:50:40,351 INFO L263 TraceCheckSpWp]: Trace formula consists of 106 conjuncts, 12 conjunts are in the unsatisfiable core [2022-11-25 17:50:40,352 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-11-25 17:50:40,662 INFO L134 CoverageAnalysis]: Checked inductivity of 134 backedges. 63 proven. 8 refuted. 0 times theorem prover too weak. 63 trivial. 0 not checked. [2022-11-25 17:50:40,662 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-11-25 17:50:41,604 INFO L134 CoverageAnalysis]: Checked inductivity of 134 backedges. 56 proven. 13 refuted. 0 times theorem prover too weak. 65 trivial. 0 not checked. [2022-11-25 17:50:41,604 INFO L136 FreeRefinementEngine]: Strategy WOLF found an infeasible trace [2022-11-25 17:50:41,604 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [730317085] [2022-11-25 17:50:41,604 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleMathsat [730317085] provided 0 perfect and 2 imperfect interpolant sequences [2022-11-25 17:50:41,604 INFO L184 FreeRefinementEngine]: Found 0 perfect and 2 imperfect interpolant sequences. [2022-11-25 17:50:41,605 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [10, 13] total 21 [2022-11-25 17:50:41,605 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1381102708] [2022-11-25 17:50:41,605 INFO L85 oduleStraightlineAll]: Using 2 imperfect interpolants to construct interpolant automaton [2022-11-25 17:50:41,605 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 21 states [2022-11-25 17:50:41,605 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WOLF [2022-11-25 17:50:41,606 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 21 interpolants. [2022-11-25 17:50:41,606 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=95, Invalid=325, Unknown=0, NotChecked=0, Total=420 [2022-11-25 17:50:41,606 INFO L87 Difference]: Start difference. First operand 38 states and 42 transitions. Second operand has 21 states, 21 states have (on average 2.9047619047619047) internal successors, (61), 21 states have internal predecessors, (61), 4 states have call successors, (6), 3 states have call predecessors, (6), 4 states have return successors, (6), 3 states have call predecessors, (6), 4 states have call successors, (6) [2022-11-25 17:50:45,229 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-11-25 17:50:45,230 INFO L93 Difference]: Finished difference Result 125 states and 146 transitions. [2022-11-25 17:50:45,231 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 40 states. [2022-11-25 17:50:45,231 INFO L78 Accepts]: Start accepts. Automaton has has 21 states, 21 states have (on average 2.9047619047619047) internal successors, (61), 21 states have internal predecessors, (61), 4 states have call successors, (6), 3 states have call predecessors, (6), 4 states have return successors, (6), 3 states have call predecessors, (6), 4 states have call successors, (6) Word has length 59 [2022-11-25 17:50:45,232 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-11-25 17:50:45,233 INFO L225 Difference]: With dead ends: 125 [2022-11-25 17:50:45,233 INFO L226 Difference]: Without dead ends: 100 [2022-11-25 17:50:45,234 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 145 GetRequests, 98 SyntacticMatches, 0 SemanticMatches, 47 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 518 ImplicationChecksByTransitivity, 3.2s TimeCoverageRelationStatistics Valid=540, Invalid=1812, Unknown=0, NotChecked=0, Total=2352 [2022-11-25 17:50:45,234 INFO L413 NwaCegarLoop]: 28 mSDtfsCounter, 163 mSDsluCounter, 124 mSDsCounter, 0 mSdLazyCounter, 404 mSolverCounterSat, 47 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 1.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 163 SdHoareTripleChecker+Valid, 152 SdHoareTripleChecker+Invalid, 451 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 47 IncrementalHoareTripleChecker+Valid, 404 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 1.1s IncrementalHoareTripleChecker+Time [2022-11-25 17:50:45,235 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [163 Valid, 152 Invalid, 451 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [47 Valid, 404 Invalid, 0 Unknown, 0 Unchecked, 1.1s Time] [2022-11-25 17:50:45,235 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 100 states. [2022-11-25 17:50:45,258 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 100 to 92. [2022-11-25 17:50:45,259 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 92 states, 82 states have (on average 1.1341463414634145) internal successors, (93), 83 states have internal predecessors, (93), 6 states have call successors, (6), 3 states have call predecessors, (6), 3 states have return successors, (9), 5 states have call predecessors, (9), 6 states have call successors, (9) [2022-11-25 17:50:45,259 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 92 states to 92 states and 108 transitions. [2022-11-25 17:50:45,260 INFO L78 Accepts]: Start accepts. Automaton has 92 states and 108 transitions. Word has length 59 [2022-11-25 17:50:45,260 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-11-25 17:50:45,260 INFO L495 AbstractCegarLoop]: Abstraction has 92 states and 108 transitions. [2022-11-25 17:50:45,260 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 21 states, 21 states have (on average 2.9047619047619047) internal successors, (61), 21 states have internal predecessors, (61), 4 states have call successors, (6), 3 states have call predecessors, (6), 4 states have return successors, (6), 3 states have call predecessors, (6), 4 states have call successors, (6) [2022-11-25 17:50:45,261 INFO L276 IsEmpty]: Start isEmpty. Operand 92 states and 108 transitions. [2022-11-25 17:50:45,261 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 62 [2022-11-25 17:50:45,261 INFO L187 NwaCegarLoop]: Found error trace [2022-11-25 17:50:45,262 INFO L195 NwaCegarLoop]: trace histogram [9, 9, 4, 4, 3, 3, 3, 3, 3, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-11-25 17:50:45,275 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_a460571b-f395-45fb-9a27-7e8e20061ee7/bin/uautomizer-ZsLfNo2U6R/mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 (15)] Forceful destruction successful, exit code 0 [2022-11-25 17:50:45,462 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 15 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_a460571b-f395-45fb-9a27-7e8e20061ee7/bin/uautomizer-ZsLfNo2U6R/mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 [2022-11-25 17:50:45,462 INFO L420 AbstractCegarLoop]: === Iteration 15 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-11-25 17:50:45,462 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-11-25 17:50:45,463 INFO L85 PathProgramCache]: Analyzing trace with hash 1053245782, now seen corresponding path program 10 times [2022-11-25 17:50:45,463 INFO L118 FreeRefinementEngine]: Executing refinement strategy WOLF [2022-11-25 17:50:45,463 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [2133274403] [2022-11-25 17:50:45,463 INFO L93 rtionOrderModulation]: Changing assertion order to TERMS_WITH_SMALL_CONSTANTS_FIRST [2022-11-25 17:50:45,463 INFO L173 SolverBuilder]: Constructing external solver with command: mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 [2022-11-25 17:50:45,463 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_a460571b-f395-45fb-9a27-7e8e20061ee7/bin/uautomizer-ZsLfNo2U6R/mathsat [2022-11-25 17:50:45,464 INFO L229 MonitoredProcess]: Starting monitored process 16 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_a460571b-f395-45fb-9a27-7e8e20061ee7/bin/uautomizer-ZsLfNo2U6R/mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 (exit command is (exit), workingDir is null) [2022-11-25 17:50:45,465 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_a460571b-f395-45fb-9a27-7e8e20061ee7/bin/uautomizer-ZsLfNo2U6R/mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 (16)] Waiting until timeout for monitored process [2022-11-25 17:50:46,000 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2022-11-25 17:50:46,000 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-11-25 17:50:46,013 WARN L261 TraceCheckSpWp]: Trace formula consists of 146 conjuncts, 79 conjunts are in the unsatisfiable core [2022-11-25 17:50:46,019 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-11-25 17:50:46,067 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 15 treesize of output 11 [2022-11-25 17:50:46,104 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 15 treesize of output 11 [2022-11-25 17:50:46,145 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 15 treesize of output 11 [2022-11-25 17:50:47,410 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-25 17:50:47,411 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-25 17:50:47,412 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-25 17:50:47,417 INFO L321 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2022-11-25 17:50:47,417 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 4 select indices, 4 select index equivalence classes, 6 disjoint index pairs (out of 6 index pairs), introduced 4 new quantified variables, introduced 6 case distinctions, treesize of input 63 treesize of output 49 [2022-11-25 17:50:48,464 INFO L173 IndexEqualityManager]: detected equality via solver [2022-11-25 17:50:48,465 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-25 17:50:48,467 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-25 17:50:48,468 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-25 17:50:48,469 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-25 17:50:48,471 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-25 17:50:48,472 INFO L173 IndexEqualityManager]: detected equality via solver [2022-11-25 17:50:48,473 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-25 17:50:48,480 INFO L321 Elim1Store]: treesize reduction 2, result has 33.3 percent of original size [2022-11-25 17:50:48,480 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 5 select indices, 5 select index equivalence classes, 6 disjoint index pairs (out of 10 index pairs), introduced 5 new quantified variables, introduced 10 case distinctions, treesize of input 104 treesize of output 89 [2022-11-25 17:50:49,037 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-25 17:50:49,038 INFO L173 IndexEqualityManager]: detected equality via solver [2022-11-25 17:50:49,039 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-25 17:50:49,040 INFO L173 IndexEqualityManager]: detected equality via solver [2022-11-25 17:50:49,041 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-25 17:50:49,043 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-25 17:50:49,056 INFO L321 Elim1Store]: treesize reduction 4, result has 42.9 percent of original size [2022-11-25 17:50:49,056 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 6 select indices, 6 select index equivalence classes, 6 disjoint index pairs (out of 15 index pairs), introduced 6 new quantified variables, introduced 15 case distinctions, treesize of input 109 treesize of output 97 [2022-11-25 17:50:49,663 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-25 17:50:49,665 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-25 17:50:49,667 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-25 17:50:49,671 INFO L321 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2022-11-25 17:50:49,673 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 4 select indices, 4 select index equivalence classes, 6 disjoint index pairs (out of 6 index pairs), introduced 4 new quantified variables, introduced 6 case distinctions, treesize of input 95 treesize of output 66 [2022-11-25 17:50:50,033 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-25 17:50:50,035 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-25 17:50:50,037 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-25 17:50:50,038 INFO L173 IndexEqualityManager]: detected equality via solver [2022-11-25 17:50:50,039 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-25 17:50:50,040 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-25 17:50:50,046 INFO L321 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2022-11-25 17:50:50,046 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 4 select indices, 4 select index equivalence classes, 6 disjoint index pairs (out of 6 index pairs), introduced 4 new quantified variables, introduced 6 case distinctions, treesize of input 92 treesize of output 78 [2022-11-25 17:50:51,515 INFO L321 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2022-11-25 17:50:51,515 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 0 stores, 4 select indices, 4 select index equivalence classes, 6 disjoint index pairs (out of 6 index pairs), introduced 4 new quantified variables, introduced 6 case distinctions, treesize of input 91 treesize of output 43 [2022-11-25 17:50:51,933 INFO L134 CoverageAnalysis]: Checked inductivity of 139 backedges. 0 proven. 128 refuted. 0 times theorem prover too weak. 11 trivial. 0 not checked. [2022-11-25 17:50:51,933 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-11-25 17:51:46,280 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 1049 treesize of output 985 [2022-11-25 17:54:00,699 INFO L321 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2022-11-25 17:54:00,790 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 1, 0 stores, 4 select indices, 4 select index equivalence classes, 0 disjoint index pairs (out of 6 index pairs), introduced 4 new quantified variables, introduced 6 case distinctions, treesize of input 14438134898 treesize of output 12571356274